EPA
United States
Environmental Protection
Agency
Environmental Monitoring
Systems Laboratory
P.O. Box 93478
Las Vegas NV 89193-3478
EPA600/R-92/144
July 1992
Research and Development
Radionuclides in Milk
Intercomparison Study
A Statistical Evaluation of the
April 24, 1992 Data
5168GR92NRD-13
-------
Radionuclides in Milk
Intercomparison Study
April 24, 1992
Environmental Protection Agency
Environmental Monitoring Systems Laboratory
Las Vegas, Nevada
-------
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
ENVIRONMENTAL MONITORING SYSTEMS LABORATORY-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702/798-2100)
Dear Participant,
Enclosed are the results of the Nuclear Radiation Assessment Division (EMSL-LV)
Intercomparison Study for Radionuclides in Milk; April 24, 1992.
Please take a few minutes to review this report and the analytical data your
laboratory submitted to us. If there are any apparent discrepancies, please notify
us immediately.
We encourage you to make use of the computer-automated data-entry system that
has been in place for some time now. As the number of participants increases, and
it becomes unrealistic for us to receive results by mail or FAX, the computer system
will be our only avenue for accepting data.
If you have any questions or comments, please send a message via the data-entry
system or contact Frank Novielli at 702/798-2159 or Patricia Honsa at 702/798-2141.
Sincerely,
Frank Novielli
Senior Chemist
Radioanalysis Branch
Enclosure
-------
NOTICE
This material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subject to the Agency's review,
and it has been approved for publication
as an EPA document.
-------
EMSL-LV Intel-comparison Study: Radionuclides in Milk, 24-Apr-1992 1/26
The following pages consist of separate sections for each of the nuclides in this study with four
parts per section. After the first, each part is separated from the next by a new page or a thick
horizontal bar. The first page of each section is a statistical summary for the nuclide and starts
with a statement of the known value, the control limits, and the warning limits.
The warning limits are placed at two normalized standard deviations above and below the
known value and the control limits are three normalized standard deviations above and below
the known value. If you keep control charts, these values will be useful for anticipating problems
with the accuracy of your analytical methods.
The coin shaped pie chart at the top of the summary page shows the fate of all the samples
sent out in number and percentage terms. The pie chart starts at the top and rotates clockwise.
The first sector represents those participants who submitted analytical results within both the
warning and control limits. The next sector represents those who are in the warning region but
not out of control. The third sector represents those who are out of control, but have passed the
the outlier test. The fourth sector represents those who have failed the outlier test. The last
sector represents those participants who have failed to respond properly. This is the case if no
analytical results were returned, or less than three determinations were reported, or if the results
were received too late. The reeding on the edge of the coin is spaced at one percent intervals, and
the sector shading becomes darker as the data reliability decreases. Sectors with zero width are
not shown.
The table in the center shows a number of statistical quantities calculated from the submitted
data based on the mean and median values in relation to the known value, both before and after
outlier removal. The lower pie chart uses the same construction as the upper chart and shows
the distribution of properly submitted data in terms of deviation from the known value divided
into sectors representing one, two, three, and greater than three normalized standard deviations.
The second part is an alphabetical listing, in lab-code order, of submitted data and several
calculated quantities. An entry that is shaded has been rejected because of one of the reasons
listed above or failure of the outlier test. The fifth and sixth columns are a measure of laboratory
precision. The Range analysis is a normalized value that you may use to keep precision control
charts. If this value is between 2.0 and 3.0, your analytical process precision is in the warning
zone;'if it exceeds 3.0 it is out of control. The eighth and ninth columns are the differences from
the mean of all non-outliers and from the known value, respectively. A tag symbol may appear in
the last column. Each page with tags has a symbol definition summary at the bottom. If there is
no tag symbol, the data is within the control limits, but it may be in the warning zone.
The third part is a three-column listing of result average, tag symbol, and lab-code in average
order excluding those labs not responding properly. In this order, all outliers and out-of-control
results appear at the top or bottom of the list.
The last part is two bar chart displays showing frequency distributions of responding
participants. The first chart places the known value at the center and a bar at each 0.2 unit of
expected precision. The second chart places the mean of the reported measurements at the center
and a bar at each 0.2 unit of standard deviation. In both cases, a bar includes those results within
0.1 unit up to the maximum of six. Any results more than six units from the center value are
shown cumulatively by a shaded bar one past the sixth unit. If the central tendency of the known
value distribution falls away from the center, an error in accuracy is indicated. If the distribution
is broad, poor precision is indicated. The mean value distribution is similar but uses the average
and standard deviation of reported results as its basis.
-------
EMSLrLV Intel-comparison Study: Radionuclides in Milk, 24-Apr-1992
2/26
Strontium-89 Statistical Summary 104 Participants
The known value of this nuclide is 38.0 pCi/1 with an expected precision of 5.0; the control limits
are 29.3 to 46.7; the warning regions are 29.3 to 32.2 and 43.8 to 46.7
69(66.3 %) Failed to respond .
..- 18(17.3%)
11 (10.6 %) Out of control
but not an outlier
Statistic
Within all limits
Respondents
6(5.8 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
%Coef. ofVar.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
31.02
8.85
78.40
28.54
-18.37
-0.79
33.33
-12.28
-0.53
Grand Avg 31.02
8.85
78.40
28.54
-18.37
-0.79
33.33
-12.28
-0.53
12(34.3 %) More than 3 norm. S.D.;
5(14.3 %) Between 2 and 3 norm. S.D.'
/ 7(2O.O %) Within 1 norm. S.D.
i
of known value
11(31.4 %) Between 1 and 2 norm. S.D.
-------
3/26 EMSL-LV Intel-comparison Study: Radionuclides in Milk,
Strontium-89
Lab Res. 1
A
AA
AB
AE
AF
AH
AI
A*T
AK
AL
AN
AP
AU
AW
AY
AZ
BA
BC
BO
BH
BL
BM
BO
BW
C
CA
CJ
CO
F
D
Dtt
DE
ȣ
m
E
EA
£B
KH
EL
FE
liil*
=
0 3
34.0
,
30.0
42.0
30.0
f
,
25.0
'
**
16.0
*
39.0
32.0
34.0
32.0
27.0
41.0
- '
33.0
12.0
,
&£
36.0
'
33.0
34.0
Res. 2 Res. 3
35.0
'
37.0
-
-
44.0
'
35.0
19.0
*
.-
15.0
-
45.0
32.0
34.0
33.0
28.0
32.0
f
>
31.0
'
13.0
"*-. '
;aair;' :
43.0
30.0
33.0
36.0
36.0
41.0
"
37.0
-
26.0
,
19.0
42.0
37.0
32.0
33.0
21.0
35.0
-
'
31.0
, '
13.0
f , ~
,
38.0
33.0
36.0
No data submitted
Insufficient
data
X 3
Exper.
Sigma
1.00
3.79
1.53
3.61
,
3.79
2.08
3.00
2.89
f
1.15
0.58
3.79
4.58
'
1.15
..,
0.58
_,
3.61
1.73
1.53
24-Apr-1992
Rng anal Normalized deviation
(R + SR) Average (grand-avg) (known) Tag
0.236 35.00
-
0.827 34.33
0.354 42.33
,
0.827 34.00
"
f
0.827 23.33
_,
0.473 16.67
0.709 42.00
0.591 33.67
0.236 33.33
0.118 32.67
0.827 25.33
1.120 36.00
'
0.236 31.67
f *,
0.118 12.67
'
0.827 39.00
0.354 32.00
0.354 34.33
TAG SYMBOLS
Determined
to be an outlier
1.38
"* ,,
f f
1.15
3.92
>
1.03
. -
-2.66
-4.97
3.80
0.92
0.80
0.57
-1.97
1,73
f
0.22
%
-6.36
'
2.76
0.34
1.15
ft s Above
11 s Below
-1.04
'', ", + \
«
-1.27
+
* i
1.50
«
-1.39
» \
«
*
-5.08 U
«
* \
« \
*
-7.39 U
» :
1.39
-1.50
* :
-1.62
«
-1.85
-4.39 11
-0.69
»
, - *
-2.19
*
-8.78 11
" * !
<&
0.35
*
*
»
-2.08
-1.27
control limit
control limit
-------
EMSL-LV Intel-comparison Study: Radionuclides in Milk, 24-Apr-1992 4/26
Strontium-89
Lab Res. 1
Exper. Rnganal Normalized deviation
Res. 2 Res! 3 Sigma (R + SR) Average (grand-avg) (known) Tag
GE
HU
I ' -.
1C
J
OB
JS
K
KL
KX
L
LE
LM
14
M'
MA
ME
ML
MP
MQ
MS
MV
N
0
PB
Fd
PM
FF
PW
Q
QK
QL
QZ
R
HK
&
SB
39.0
44.0
39.0
33.0
30.0
36.0
35.0
33.0
30.0
10.0
40.0
19.0
20.0
47.0
34.0
40.0
28.0
30.0
32.0
35.0
28.0
32.0
9.0
46.0
17.0
16.0
38.0
37.0
37.0
30.0
27.0
40.0
35.0
27.0
32.0
11.0
48.0
19.0
15.0
4.93
5.13
1.53
2.52
1.73
4.00
0.00
3.21
1.15
1.00
4.16
1.15
2.65
1.120
1.345
0.354
0.591
0.354
0.945
0.000
0.709
0.236
0.236
0.945
0.236
0.591
41.33
38.33
38.67
30.33
29.00
36.00
35.00
29.33
31.33
10.00
44.67
18.33
17.00
3.57
2.53
2.65
-0.24
-0.70
1.73
1.38
-0.58
0.11
-7.28
4.73
-4.39
-4.86
1.15
0.12
0.23
-2.66
-3.12
-0.69
-1.04
-3.00
-2.31
-9.70
2.31
-6.81
-7.27
*
*
*
#
*
*
*
*
*
*
*
|j
*
*
s No data submitted
0 s Insufficient data
TAG SYMBOLS
x s Determined to be an outlier
tt s Above control limit
li s Below control limit
-------
5/26 EMSL-LV Intercomparison Study: Radionuclides in Milk, 24-Apr-1992
Strontium-89
Lab
SI
SS
T
IB
TH
TI
TK
U
W
Y
Z
Exper. Rng anal Normalized deviation
Res. 1 Res. 2 Res. 3 Sigma (R + SR) Average (grand-avg) (known) Tag
_. ^
_.
" ' ' '"''''»
29.0 23.0 29.0 3.46 0.709 27.00 -1.39 -3.81 JJ
28.0 28.0 24.0 2.31 0.473 26.67 -1.51 -3.93 JJ
'
-
,
'
#
. .. , .. *
' - < *
*
13.0 18.0 18.0 2.89 0.591 16.33 -5.09 -7.51 JJ
-
»
39.0 39.0 41.0 1.15 0.236 39.67 3.00 0.58
37.0 41.0 37.0 2.31 0.473 38.33 2.53 0.12
Data sorted by Laboratory Average
Average Tag Lab
10.00 JJ QK
12.67 JJ DE
16.33 JJ U
16.67 JJ BC
17.00 JJ R
18.33 JJ QZ
23.33 JJ AU
25.33 JJ CA
26.67 JJ T
27.00 JJ SS
29.00 JJ MS
Average Tag Lab
29.33 PM
30.33 MQ
31.33 Q
31.67 D
32.00 EL
32.67 C
33.33 BO
33.67 BL
34.00 AK
34.33 FE
34.33 AE
35.00 PB
Average Tag Lab
35.00 A
36.00 N
36.00 CJ
38.33 Z
38.33 KX
38.67 ME
39.00 E
39.67 Y
41.33 1C
42.00 BH
42.33 AI
44.67 QL
% Frequency distribution of responding labs(expected prec. vs known value)
10-
0-
=
0 =
I:"::::::::::::":::::::"::::"::::::::::::::::::::::::::
i
i f f if fiiiii i
'6 ' ''4 exp.'prec. -2 ' ^^ ' +2 exp.'prec. *« ' +*
value
No data submitted
Insufficient data
TAG SYMBOLS
x 3 Determined to be an outlier
tt s Above control limit
JJ = Below control limit
-------
EMSLrLV Intel-comparison Study : Radionuclides in Milk, 24-Apr-1992 6/26
Strontium-89
Frequency distribution of responding labs(std. dev. vs mean value)
10-1
-6
-4 std. dev. -2
0
value
std. dev.
-------
EMSL-LV Inter-comparison Study: Radionuclides in Milk, 24-Apr-1992 7/26
Strontium-90
Statistical Summary
104 Participants
The known value of this nuclide is 29.0 pCi/1 with an expected precision of 5.0; the control limits
are 20.3 to 37.7; the warning regions are 20.3 to 23.2 and 34.8 to 37.7
62(59.6 %) Failed to respond ,
6(5.8 %) Out of control
but not an outlier
Statistic
. 31 (29.8 %) Within all limits
Respondents
* 5(4.8 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
%Coef. ofVar.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
24.66
5.43
29.49
22.02
-14.97
-0.80
25.67
-11.49
-0.61
Grand Avg 24.66
5.43
29.49
22.02
-14.97
-0.80
25.67
-11.49
-0.61
6(14.3 %) More than 3 norm. S.D.
5(11.9 %) Between 2 and 3 norm. S.D.*
; 16(38.1 %) Within 1 norm. S.D.
of known value
15(35.7 %) Between 1 and 2 norm. S.D.
-------
8/26 EMSL-LV Intel-comparison Study: Radionuclides in Milk, 24-Apr-1992
Strontium-90
Lab
A
AA
AB
AE
AF
AH
AI
AJ
AK
AL
Atf
AP
AU
AW
AY
AZ
UA
BC
BO
BH
BL
BM
BO
BW
C
CA
CJ
CO
F
D
DD
DE
DL
DM
I3KT
BY
E
EA
EB
KK
EL
EX
FE
FL
Res. 1
24.0
12.0
23.0
30.0
27.0
24.0
28:0
'
....
27.0
'
26.0
24.0
'"'"* "' '
18.0
25.0
24.0
24.0
25.0
24.0
26.0
24.0
*
26.0
.-.-
25.0
f f f
23.0
28.0
'
27.0
22.0
,
Res. 2
25.0
10.0
f
26.0
29.0
'
30.0
21.0
31.0
28.0
26.0
24.0
14.0
V
28.0
26.0
24.0
26.0
23.0
26.0
21.0
, '
26.0
26.0
,
' ';' ':'-'»' -'''-
'&L0 '
30.0
26.0
22.0
'
Res. 3
28.0
12.0
27.0
26.0
.
30.0
20.0
30.0
j. f
24.0
*"
26.0
28.0
*"' *
13.0
24.0
23.0
23.0
24.0
26.0
26.0
22.0
' :i1
s f
25.0
f *
26.0
' <'' '-*".
ff ff
f ' f f f
30.0
'
27.0
23.0
'
s No data submitted
0 =
Insufficient
data
x =
Exper.
Sigma
2.08
1.15
2.08
2.08
1.73
*
2.08
1.53
..
2.08
1
0.00
2.31
2.65
2.08
1.53
0.58
-
1.00
1.53
0.00
1.53
X
0.58
-.'',/
0.58
/> /
',!
"
1.15
'
0.58
0.58
"
Rng anal
(R + SR)
0.473
0.236
0.473
0.473
-
0.354
0.473
0.354
0.473
0.000
0.473
0.591
0.473
0.354
0.118
0.236
0.354
0.000
0.354
0.118
0.118
0.236
0.118
0.118
Average
25.67
11.33
25.33
28.33
,
29.00
21.67
29.67
..
26.33
26.00
25.33
'
15.00
' '
25.67
24.33
23.67
25.00
24.33
26.00
22.33
25.67
25.67
' '
29.33
26.67
22.33
TAG SYMBOLS
Determined
to be an outlier
Normalized
(grand-avg)
0.35
-4.62
'
0.23
1.27
' ,-
1.50
f f
-1.04
1.73
f
0.58
0.46
0.23
'
-3.35
0.35
-0.11
-0:34
'
0.12
-0.11
0.46
-0.81
-
0.35
' ff.
0.35
1.62
0.70
-0.81
deviation
(known) Tag
-1.15
-6.12 Jl
«
-1.27
-0.23
*
0.00
«
-2.54
0.23
«
»
-0.92
-1.04
-1.27
*
-4.85 11
#'
-1.15
-1.62
*
-1.85
* \
-1.39
-1.62
-1.04
-2.31
« ;
-1.15
* i
-1.15
*
»
0
« :
0.12
*
*
-0.81
*
-2.31
«
ft s Above control limit
U = Below control limit
-------
EMSL-LV Intel-comparison Study: Radionuclides in Milk, 24-Apr-1992 9/26
Strontium-90
Lab Res. 1
" .ff .
,<3E^
: aaJf
X --
1C
w
Jf '
*m
iJfiL
K
KL
KX
It '
-us-
LF
LM
LB
M
MA
ME
ML
MP
MQ
MS
HV
N
0
PB
JPC
PM
PP"
PV
PW
pv
,A. jK.
Q
QB
QK
QL
<$&
QZ
R
RK
S
'SUM
=
^ 0 5
?X "" i .- f f*
'/" " '"' ,s'2
' , * ,
.- . ft t
31.0
" X
f f ff f
, '
s * f *
f
< ',
22.0
f '-/'' ''*'
28.0
f f '
16.0
/-
29.0
..
11.0
29.0
f
10.0
27.0
,
'
?" 'f 'f j f ff f
Res. 2
' 'fff ' f' %f f f ff ' ff >
*; ~i X'4"",~-
; ,; " '' ','
,}''' < '' ,'
: ' , ' i
3fO
',',, ,, ';'"',"''
f f ' ' $ f
'"'< ''''
f f f
f f
>
'
25.0
,>#>
';' ' ' ' V ' '
', /",/' '?<'; '
', ''',,''
' '' ''*/''''-
' ' ' , ,'
'--', V
28.0
- xV
'
28.0
30.0
,
26.0
"" f.
30.0
- - ' "': %.
26.0
V'*f"
16.0
'' * '' V"'/y '" ' '
' '*t* , ,'''? '
30.0
, ;, - - ' .' ,-,,
9.0
27.0
10.0
33.0
,
.,
y '
Res. 3
f ? * *
'''''" ,
, I'*''', , '
f ff j'f
32.0
'/*' "'7
"' ,
''.- ,-f .
^f
24.0
/*"f "/
f-
-f
,
32.0
^
'
28.0
29.0
21.0
'/'
30.0
V ' - * '
29.0
,',"'%'f><'
18.0
{V ',"
'-I /
32.0
9.0
26.0
9.0
34.0
f t .y
No data submitted
Insufficient
data
X S
Exper.
Sigma
^
^ f ff
''
,
1.00
f
, >
^ f
J
1.53
f *
'
,
,
2.00
'
1.15
0.58
2.65
'
0.58
-
1.53
-
1.15
'
1.53
1.15
1.53
0.58
3.79
Rng anal Normalized deviation
(R + SR) Average (grand-avg) (known) Tag
'z "" *
' ff
' > '''',,
-., 't :- '-
0.236
- ;" ;-^
', ,
' , ' ' '^
^
,
' "-
0.354
..
'
0.473
0.236
0.118
0.591
0.118
0.354
0.236
,
0.354
0.236
0.354
0.118
0.827
'
f ff f ffff^ f"Jff'f "f" f Js'j
'/*''>'? ^;'/f '/%"',
'" '*'' '' '?,, S ,<'''"#
,V -', ,{- '^fy'rJ,^
32.00
'-.i-i'"'* '*'''"* ';
''^ ' '' '
, ' , ' /' '
'"' ' */ '"^
^ ^ > f f
fff f ' f f$!
' '', '' ' ' '/
' ' ' ">'ff'f '*'<;
23.67
' /-',*!' ' ,f"; '?
' ' f f f
, '
; ,f , ' f,,\, ff,
' ':. f
' ' ' '
. ' '
30.00
'
f * ' r
27.33
29.67
f
23.00
'
30.33
j f _. *
27.67
' ' * ' >'
16.67
' '" ,'
f *
30.33
9.67
27.33
9.67
31.33
,.
j '
TAG SYMBOLS
Determined
to be an
outlier
^' f'/fj," f//ff~ f,' ' 'f',^ ' ' 'f
/>^;"^7E":
f *"?/'% '#*' '/ f
rfJ>J'f'ff3fff f , ^f 'f S .
f/£ f ffts£ / "$ tf/Wb $
2.54
*,':*%''/';'"
f "/ ff f'
^ ",', ,- '
fff f 'f '
ff f ff
'
f
-0.34
'' ', , .. '..
f j f
',
f * f f f
ff
f
' '
1.85
>
f
0.93
1.73
-0.57
;/ , ' ',
1.97
'
1.04
^,
-2.77
, '
_,
1.97
-5.19
0.93
-5.19
2.31
'' '
It s Above
f "ff" f f f *~f"
/ " ;! '*''-' *'
'* '''f''j ' ' *
J *"','-;,- '*-«-
1.04
'^' *' "»" -
- '' *
''- '- '.'* -
/ ;
' ' .. * ....
* ,
-1.85
*
#
*
»
*
* -
'#
0.35
;: *
V
-0.58
0.23
/ ,, *<
-2.08
*
0.46
*
-0.46
*
-4.27 U
»
*
0.46
»
-6.70 'i
-0.58
*
-6.70 tt
0.81
*
*
control limit
11 s Below control limit
-------
10/26
EMSL-LV Intel-comparison Study: Radionuclides in Milk, 24-Apr-1992
Strontium-90
Lab
Si
SK
ss
T
TA
IB
TE
U
W
Y
Z
Exper.
Res. 1 Res. 2 Res. 3 Sigma
"* f ' ** f '
f
*
f *
28.0 26.0 26.0 1.15
20.0 19.0 19.0 0.58
,
-
25.0 21.0 23.0 2.00
24.0 23.0 23.0 0.58
28.0 33.0 29.0 2.65
Rng anal
(R + SR)
v "
0.236
0.118
0.473
0.118
0.591
Normalized deviation
Average (grand-avg) (known)
^ ' * ,
'" ' ' , r
^
26.67 0.70 -0.81
19.33 -1.84 -3.35
'
"
23.00 -0.57 -2.08
23.33 -0.46 -1.96
30.00 1.85 0.35
Tag
*-.
»
^
*
*
*
»
*
Data sorted by Laboratory Average
Average
9.67
9.67
11.33
15.00
16.67
19.33
21.67
22.33
22.33
23.00
23.00
23.33
23.67
23.67
Tag Lab
U QZ
U QK
U AA
U BC
$ PV
U T
AK
FE
CO
U
N
Y
KX
BO
Average
24.33
24.33
25.00
25.33
25.33
25.67
25.67
25.67
25.67
26.00
26.00
26.33
26.67
26.67
Tag
Lab
CA
BL
C
AZ
AE
DE
D
BH
A
CJ
AY
AU
SS
EL
Average Tag
27.33
27.33
27.67
28.33
29.00
29.33
29.67
29.67
30.00
30.00
30.33
30.33
31.33
32.00
Lab
QL
MQ
PM
AF
AI
E
MS
AL
Z
ME
Q
PB
R
1C
% Frequency distribution of responding labs( expected prec. vs known value)
-6
||
*4 exp. prec. ~2
^
= No data submitted
0 s Insufficient data
.1
ill
known
value
i
TAG SYMBOLS
+2 exp. prec. +4
It s Above control
x s Determined to be an outlier & = Below control
+6
limit
limit
-------
EMSL-LV Intel-comparison Study: Radionuclides in Milk, 24-Apr-1992 11/26
Strontium-90
% Frequency distribution of responding labs(std. dev. vs mean value)
10-
ili
ill J, Jf
-4 std. dev. -2 m<0jn +2 std. dev.
value
-------
EMSL-LV Intel-comparison Study: Radionuclides in Milk, 24-Apr-1992 12/26
Iodine-131 Statistical Summary 104 Participants
The known value of this nuclide is 78.0 pCi/1 with an expected precision of 8.0; the control limits
are 64.1 to 91.9; the warning regions are 64.1 to 68.7 and 87.3 to 91.9
18(17.3 %) Failed to respond ..
5(4.8 %) Outliers '
3(2.9 %) Out of control
but not an outlier
Statistic
. 72(69.2 %) Within all limits
Respondents
- 6(5.8 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
%Coef. ofVar.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
78.14
10.10
101.99
12.93
0.17
0.01
78.17
0.21
0.02
Grand Avg 78.45
6.07
36.88
7.74
0.58
0.07
78.33
0.43
0.05
8(9.3 %) More than 3 norm. S.D. »
6(7.0 %) Between 2 and. 3 norm. S.D.
47(54.7 %) Within 1 norm. S.D.
of Known value
- 25(29.1 %) Between 1 and 2 norm. S.D.
-------
13/26 EMSL-LV Intel-comparison Study: Radionuclides in Milk, 24-Apr-1992
Iodine-131
Lab
A
AA
AB
AE
AF
AH
AI
AJ
AK
AL
AN
AP
AU
AW
AY
AZ
BA
BO
BO
BH
BL
BM
BO
BW
C
CA
CJ
CO
CP
CQ
D
DD
DE
DL
DM
DT
DY
E
EA
EB
EH
EL
EX
FE
FL
Res. 1
82.0
95.0
76.0
84.0
77.0
82.0
79.0
77.0
79.0
87.0
3&0
78.0
72.0
76.0
84.0
9T#
£10
74.0
84.0
81.0
78.0
92.0
82.0
77.0
68.0
83.0
80.0
83.0
76.0
85.0
71.0
75.0
78.0
74.0
78.0
84.0
61.0
78.0
78.0
76.0
96.0
82.0
85.0
Res. 2
75.0
90.0
i'.
76.0
81.0
89.0
68.0
76.0
78.0
74.0
82.0
34.0
77.0
69.0
85.0
88.0
ii&o
55,0
79.0
84.0
83.0
76.0
106.0
83.0
84.0
71.0
71.0
80.0
83.0
80.0
84.0
71.0
75.0
78.0
66.0
77.0
87.0
63.0
81.0
83.0
75.0
82.0
82.0
85.0
Res. 3
82.0
87.0
80.0
82.0
85.0
83.0
79.0
76.0
82.0
84.0
35.0
78.0
70.0
90.0
83.0
1094)
5?J&
78.0
79.0
82.0
80.0
68.0
80.0
75.0
76.0
78.0
80.0
84.0
78.0
84.0
71.0
76.0
80.0
69.0
76.0
81.0
62.0
81.0
74.0
90.0
93.0
84.0
88.0
& No data submitted
0 9
Insufficient
data
x =
Exper.
Sigma
4.04
4.04
*
2.31
1.53
6.11
8.39
1.73
1.00
4.04
2.52
2.66
0.58
1.53
7.09
2.65
8-33
3.06
2.65
2.89
1.00
2.00
19.22
1.53
4.73
4.04
6.03
0.00
0.58
2.00
0.58
0.00
0.58
1.15
4.04
1.00
3.00
1.00
1.73
4.51
8.39
7.37
. 1.15
1.73
Rng anal Normalized deviation
(R + SR) Average (grand-avg) (known) Tag
0.517
0.591
0.295
0.222
0.886
1.205
0.222
0.148
0.591
0.369
0.369
0.074
0.222
1.064
0.369
1.345
0.443
0.369
0.369
0.148
0.295
4.439
0.222
0.665
0.591
0.886
0.000
0.074
0.295
0.074
0.000
0.074
0.148
0.591
0.148
0.443
0.148
0.222
0.665
1.205
1.064
0.148
0.222
79.67
90.67
77.33
82.33
83.67
77.67
78.00
77.00
78.33
84.33
86.00
77.67
70.33
83.67
85.00
KKUJ3
5433
77.00
82.33
82.00
78.00
88.67
81.67
78.67
71.67
77.33
80.00
83.33
78.00
84.33
71.00
75.33
78.67
69.67
77.00
84.00
62.00
80.00
78.33
80.33
90.33
82.67
86.00
TAG SYMBOLS
Determined
to be an
outlier
0.26
2.65
'
-0.24
0.84
1.13
-0.17
-0.10
-0.31
-0.02
1.27
940
-0.17
-1.76
1.13
1.42
0.04
-&2£
-0.31
0.84
0.77
-0.10
2.21
0.70
0.05
-1.47
-0.24
0.34
1.06
-0.10
1.27
-1.61
-0.67
0.05
-1.90
-0.31
1.20
-3.56
0.34
-0.02
0.41
2.57
0.91
1.63
ft 9 Above
Jl = Below
0.36
2.74
*
-0.14
0.94
1.23
-0.07
0.00
-0.22
0.07
1.37
-9.09 x
-0.07
*
-1.66
1.23
1.52
' 343 x
."JR 't^i v
W-Jt*t- A
-0.22
0.94
0.87
0.00
2.31
0.79
0.14
-1.37
-0.14
0.43
1.15
0.00
1.37
-1.52
-0.58
0.14
-1.80
-0.22
1.30
-3.46
0.43
0.07
0.51
2.67
1.01
1.73
control limit
control limit
-------
EMSL-LV Intel-comparison Study: Radionuclides in Milk,
24-Apr-1992
14/26
Iodine-131
Lab
GE
:f'Mf
I
1C
IU
J
JR
JS
K
KL
KX
L
LE
LF
LM
LR
M
MA
ME
ML
MP
MQ
MS
MV
N
NH
NJ
O
PB
-*e,
PM
PV
PW
PY
Q
QB
QK
QL
QX
QZ
R
RK
S
80
Res. 1
76.0
₯"*'*'""','£
79.0
84.0
78.0
83.0
79.0
74.0
73.0
74.0
74.0
61.0
82.0
- 48.0,
73.0
60.0
72.0
'' ,
76.0
81.0
88.0
80.0
78.0
77.0
78.0
77.0
85.0
80.0
53.0
88.0
* j' '
77.0
-
82.0
65.0
77.0
68.0
80.0
,
'
'
Res. 2
75.0
'> :;;:"'-
77.0
88.0
76.0
86.0
75.0
76.0
80.0
74.0
74.0
79.0
f '
. 47,0
75.0
61.0
75.0
-',
71.0
76.0
87.0
79.0
78.0
78.0
83.0
78.0
84.0
65.0
56.0
94.0
',,'>,; " ' *
81.0
'
81.0
90.0
89.0
75.0
80.0
-
v
Res. 3
75.0
\"' '?,'%; /
80.0
84.0
70.0
83.0
76.0
79.0
67.0
80.0
76.0
78.0
'
'' , " 510 *
76.0
61.0
77.0
' - , -
66.0
84.0
90.0
74.0
76.0
78.0
86.0
78.0
80.0
73.0
71.0
93.0
f f "
76.0
87.0
45.0
83.0
70.0
78.0
' '
' ' -
= No data submitted
0 =
Insufficient
data
x =
Exper.
Sigma
0.58
*/ ** '* '' " f/ ''
1.53
2.31
4.16
1.73
2.08
2.52
6.51
3.46
1.15
2.08
-
- %M
1.53
0.58
2.52
f
5.00
4.04
1.53
3.21
1.15
0.58
4.04
0.58
2.65
7.51
9.64
3.21
2.65
3.21
22.55
6.00
3.61
1.15
'
Rng anal Normalized deviation
(R + SR) Average (grand-avg) (known) Tag
0.074
' ' ' ' 't:
0.222
0.295
0.591
0.222
0.295
0.369
0.960
0.443
0.148
16.956
0.295
"">
Vv AjJt^f^
\r'iv^fv
0.222
0.074
0.369
^
0.738
0.591
0.222
0.443
0.148
0.074
0.591
0.074
0.369
1.205
1.627
0.443
0.369
0.443
5.424
0.886
0.517
0.148
75.33
f't ' ' .- f.-s ' .-' ^ g^ft-; "V f
78.67
85.33
74.67
84.00
76.67
76.33
73.33
76.00
74.67
Ii9.67 ,
79.67
, ,''' ''" ';
4«?00, »
74.67
60.67
74.67
' ,
71.00
80.33
88.33
77.67
77.33
77.67
82.33
77.67
83.00
72.67
60.00
91.67
78.00
83.33
66.67
83.00
71.00
79.33
_,
TAG SYMBOLS
Determined
to. be an
outlier
70.67^_
C^TT3':
0.05
1.49
-0.82
1.20
-0.39
X f
-0.46
-1.11
-0.53
-0.82
, &92
0.26
"
-6J« '
-0.82
-3.85
-0.82
-1.61
0.41
2.14
-0.17
-0.24
-0.17
0.84
-0.17
0.99
-1.25
-3.99
2.86
-0.10
1.06
-2.55
0.99
-1.61
0.19
'
ft = Above
11 s Below
:0.58 ^
"-, '';;>,'; ,:, + >'-'
0.14
1.59
-0.72
1.30
-0.29
-0.36
-1.01
-0.43
-0.72
9.02 x
0.36
9
fi ltt& \y
**\rtJ&\f ^\
-0.72
-3.75 U
-0.72
«'
-1.52
0.51
2.24
-0.07
-0.14
-0.07
0.94
-0.07
1.08
-1.15
' ', *
-3.90 $
2.96
*
0.00
1.15
-2.45
1.08
-1.52
0.29
*
*
*
control limit
control limit
-------
15/26 EMSL-LV Intel-comparison Study: Radionuclides in Milk, 24-Apr-1992
Iodine-131
Lab Res. 1 Res. 2
J8DE " , ' "' -''>*-
&K
88 83.0 78.0
T 80.0 79.0
TA 69.0 73.0
TB 66.0 76.0
TH
TI 78.0 86.0
U 76.0 74.0
W 70.0 77.0
Y 78.0 77.0
Z 85.0 90.0
Exper. Rng anal
Res. 3 Sigma (R + SR)
83.0 2.89 0.369
82.0 1.53 0.222
68.0 2.65 0.369
80.0 7.21 1.064
; f
84.0 4.16 0.591
84.0 5.29 0.738
77.0 4.04 0.517
82.0 2.65 0.369
79.0 5.51 0.812
Normalized deviation
Average (grand-avg) (known)
, --' ' '-f "''--, £ /A"'"
. f j * j
81.33 0.62 0.72
80.33 0.41 0.51
70.00 -1.83 -1.73
74.00 -0.96 -0.87
82.67 0.91 1.01
78.00 -0.10 0.00
74.67 -0.82 -0.72
79.00 0.12 0.22
84.67 1.35 1.44
Tag
' #'
'*
Data sorted by Laboratory Average
Average Tag
36.00 x
49.00 x
54.33 x
60.00 U
60.67 U
62.00 U
66.67
69.67
70.00
70.33
71.00
71.00
71.00
71.67
72.67
73.33
74.00
74.67
74.67
74.67
74.67
74.67
75.33
75.33
76.00
76.33
76.67
77.00
s No data submitted
0 s Insufficient data
Lab Average Tag
AP 77.00
LR 77.00
BG 77.33
PV 77.33
MA 77.33
EA 77.67
QL 77.67
DT 77.67
TA 77.67
AY 77.67
QZ 78.00
MP 78.00
DE 78.00
CJ 78.00
PM 78.00
KL 78.33
TB 78.33
W 78.67
ME 78.67
M 78.67
L 79.00
IU 79.33
GE 79.67
DL 79.67
KX 80.00
K 80.00
JR 80.33
DY 80.33
TAG SYMBOLS
Lab Average Tag
BH 80.33
AK 81.33
N 81.67
CO 82.00
AE 82.33
O 82.33
NH 82.33
MV 82.67
AU 82.67
AI 83.00
U 83.00
Q 83.33
D 83.33
BO 83.67
AJ 83.67
EH ' 84.00
AL 84.00
I 84.33
DM 84.33
CA 84.67
Y 85.00
R 85.33
LF 86.00
A 88.33
EB 88.67
CP 90.33
T 90.67
MQ 91.67
1T = Above control
x s Determined to be an outlier U s Below control
Lab
EL
SS
c
BM
NJ
BL
AF
TI
FE
QX
PB
QK
CQ
AZ
AH
J
E
DD
AN
Z
BA
1C
FL
MS
BW
EX
AA
PW
limit
limit
-------
EMSL-LV Intel-comparison Study: Radionuclides in Milk, 24-Apr-1992 16/26
Iodine-131
Data sorted by Laboratory Average
Average Tag Lab | Average Tag Lab | Average Tag Lab
106.33 x BC
119.67 x LE
Frequency distribution of responding labs(expected prec. vs known value)
,04 .
"
-6 ;4 exp.prec. -2known +'2 exp.'prec. **
value
% Frequency distribution of responding labs(std. dev. vs mean value)
10-
OJ^T-
std. dev. -2 0 +2 std. dev. +4 +6
mean
value
s No data submitted TAG SYMBOLS fl = Above control limit
0 s Insufficient data x s Determined to be an outlier U ^ Below control limit
-------
EMSL-LV Intercomparison Study: Radionuclides in Milk, 24-Apr-1992 17/26
Cesium-137 Statistical Summary 104 Participants
The known value of this nuclide is 39.0 pCi/1 with an expected precision of 5.0; the control limits
are 30.3 to 47.7; the warning regions are 30.3 to 33.2 and 44.8 to 47.7
16(15.4 %) Failed to respond .,
2(1. 9%) Outliers'
3(2.9 %) Out of control '
but not an outlier
Statistic
. 76(73.1 %) Within all limits
Respondents
7(6.7 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
%Coef. ofVar.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
40.34
4.09
16.72
10.14
3.43
0.33
40.17
2.99
0.29
Grand Avg 40.32
3.59
12.92
8.91
3.39
0.37
40.17
2.99
0.32
6(6.8 %) More than 3 norm. S.D. »,
6(6.8 %) Between 2 and 3 norm. S.D.
;51(58.O %) Within 1 norm. S.D.
of known value
25(28.4 %) Between 1 and 2 norm. S.D.
-------
18/26 EMSL-LV Intel-comparison Study: Radionuclides in Milk,
Cesium-137
Lab Res. 1
A
AA
AB
AE
AF
AH
AI
AJ
AK
AL
AN
AP
AU
AW
AY
AZ
BA
BC
BG
BH
BL
BM
BO
BW
C
CA
CJ
CO
CP
CQ
D
DD
DE
DL
DM
DT
DY
E
EA
EB
EH
EL.
EX
FE
FL
40.0
44.0
45.0
42.0
40.0
41.0
48.0
41.0
33.0
44.0
41.0
43.0
31.0
32.0
42.0
48.0
28.0
40.0
40.0
43.0
40.0
35.0
37.0
38.0
48.0
44.0
39.0
42.0
39.0
44.0
42.0
36.0
41.0
37.0
39.0
42.0
39.0
41.0
40.0
36.0
37.0
40.0
45.0
Res. 2
39.0
41.0
"
47.0
39.0
42.0
34.0
51.0
41.0
35.0
45.0
41.0
41.0
33.0
35.0
37.0
45.0
£7X*
41.0
40.0
41.0
41.0
30.0
37.0
40.0
48.0
40.0
39.0
42.0
40.0
44.0
42.0
37.0
40.0
37.0
39.0
40.0
41.0
41.0
41.0
42.0
43.0
44.0
44.0
Res. 3
39.0
39.0
46.0
41.0
40.0
40.0
50.0
41.0
30.0
48.0
41.0
41.0
36.0
39.0
40.0
47.0
28.D
41.0
40.0
43.0
43.0
38.0
37.0
40.0
44.0
46.0
39.0
43.0
40.0
47.0
42.0
37.0
41.0
43.0
39.0
38.0
40.0
41.0
38.0
40.0
45.0
44.0
44.0
s No data submitted
0 s
Insufficient
data
XN 33
Exper.
Sigma
0.58
2.52
,
1.00
1.53
1.15
3.79
1.53
0.00
2.52
2.08
0.00
1.15
f
2.52
3.51
2.52
1.53
0.58
0.58
0.00
1.15
1.53
4.04
0.00
1.15
2.31
3.06
0.00
0.58
0.58
1.73
0.00
0.58
0.58
3.46
0.00
2.00
1.00
0.00
1.53
3.06
4.16
2.31
0.58
24-Apr-1992
Rng anal Normalized deviation
(R + SR) Average (grand-avg) (known) Tag
0.118
0.591
0.236
0.354
0.236
0.827
0.354
0.000
0.591
0.473
0.000
0.236
0.591
0.827
0.591
0.354
0.11£
0.118
0.000
0.236
0.354
0.945
0.000
0.236
0.473
0.709
0.000
0.118
0.118
0.354
0.000
0.118
0.118
0.709
0.000
0.473
0.236
0.000
0.354
0.709
0.945
0.473
0.118
39.33
41.33
46.00
40.67
40.67
38.33
49.67
41.00
32.67
45.67
41.00
41.67
33.33
35.33
39.67
46.67
mm
40.67
40.00
42.33
41.33
34.33
37.00
39.33
46.67
43.33
39.00
42.33
39.67
45.00
42.00
36.67
40.67
39.00
39.00
40.00
40.00
41.00
39.67
39.33
41.67
42.67
44.33
TAG SYMBOLS
Determined
to be an
outlier
-0.34
0.35
f
1.97
0.12
0.12
-0.69
3.24
0.23
-2.65
1.85
0.23
0.47
f
-2.42
-1.73
-0.23
2.20
-4^8
0.12
-0.11
0.70
0.35
-2.07
-1.15
-0.34
2.20
1.04
-0.46
0.70
-0.23
1.62
0.58
-1.27
0.12
-0.46
-0.46
-0.11
-0.11
0.23
-0.23
-0.34
0.47
0.81
1.39
IT = Above
li = Below
0.12
0.81
«
2.42
0.58
0.58
-0.23
3.70 tT
0.69
-2.19
2.31
0.69
0.92
*
-1.96
-1.27
0.23
2.66
~&M X
0.58
0.35
1.15
0.81
-1.62
-0.69
0.12
2.66
1.50
0.00
1.15
0.23
2.08
1.04
-0.81
0.58
0.00
0.00
0.35
0.35
0.69
0.23
0.12
0.92
1.27
1.85
control limit
control limit
-------
EMSL-LV Intercomparison Study: Radionuclides in Milk, 24-Apr-1992 19 / 26
Cesium-137
Lab
GE
'"mi-
i
1C
IU
j
JR
«IS -
K
KL
KX
L
LE
LF
LM
LR
M
MA
ME
MI*:
MP
MQ
MS
MV
N
NH
NJ
O
PB
JPO
PM
PP
PV
PW
PT--
Q
QB
QK
QL
QX
QZ
R
RK
S
SB
=
0 B
Res. 1
37.0
" " ' , , '*
42.0
44.0
38.0
41.0
51.0
' ,
35.0
37.0
38.0
37.0
41.0
42.0
..
48.0
38.0
35.0
39.0
/ ',
46.0
38.0
40.0
43.0
39.0
48.0
40.0
38.0
36.0
f f f
v f j.
43.0
34.0
41.0
39.0
,,, , '-,%,.,
37.0
46.0
36.0
38.0
48.0
50*0
41.0
f
,f
,
' ,
Res. 2
37.0
39.0
40.0
38.0
40.0
50.0
/ *
35.0
35.0
38.0
36.0
40.0
41.0
..
37.0
37.0
35.0
41.0
.- ' ' f
38.0
43.0
44.0
45.0
38.0
55.0
43.0
38.0
35.0
"
42.0
33.0
43.0
39.0
.:'/,-. , , .y '.:
42.0
42.0
35.0
45.0
47.0
5&0
42.0
,
f s *
V
Res. 3
36.0
39.0
42.0
37.0
40.0
50.0
36.0
36.0
40.0
38.0
38.0
43.0
'
40.0
37.0
34.0
44.0
/ ,
41.0
42.0
42.0
42.0
40.0
44.0
38.0
38.0
35.0
45.0
35.0"
46.0
40.0
39.0
43.0
33.0
32.0
48.0
52,0
44.0
'
' ,
-
No data submitted
Insufficient
data
X s
Exper.
Sigma
0.58
,ff
1.73
2.00
0.58
0.58
0.58
,,
0.58
1.00
1.15
1.00
1.53
1.00
-
5.69
0.58
0.58
2.52
'
4.04
2.65
2.00
1.53
1.00
5.57
2.52
0.00
0.58
*
1.53
1.00
2.52
0.58
. ,
2.52
2.08
1.53
6.51
0.58
4.04
1.53
Rng anal
(R + SR)
0.118
'' '"'" f
0.354
0.473
0.118
0.118
0.118
, '
0.118
0.236
0.236
0.236
0.354
0.236
'
1.570
0.118
0.118
0.591
;
0.945
0.591
0.473
0.354
0.236
1.570
0.591
0.000
0.118
0.354
0.236
0.591
0.118
-
0.591
0.473
0.354
2.020
0.118
&82?
0.354
'
Normalized deviation
Average
36.67
-, w,:.*: ,, x ,;
40.00
42.00
37.67
40.33
50.33
f f f f _.
35.33
36.00
38.67
37.00
39.67
42.00
41.67
37.33
34.67
41.33
f
41.67
41.00
42.00
43.33
39.00
49.00
40.33
38.00
35.33
f f
43.33
34.00
° 43.33
39.33
39.33
43.67
34.67
38.33
47.67
54,33
42.33
'
TAG SYMBOLS
Determined
to be an outlier
(grand-avg) (known) Tag
-1.27
;'/' ;""??s, /T^'
-0.11
0.58
-0.92
0.00
3.47
,' '', ' , '
-1.73
-1.50
-0.57
-1.15
-0.23
0.58
"
0.47
-1.04
-1.96
0.35
'
0.47
0.23
0.58
1.04
-0.46
3.01
0.00
-0.80
-1.73
/
1.04
-2.19
1.04
-0.34
-0.34
1.16
-1.96
-0.69
2.54
485
0.70
'
-
,.
IT s Above
li = Below
-0.81
...;; ^%%.,t :
0.35
1.04
-0.46
0.46
3.93 IT
,- *
-1.27
-1.04
-0.12
-0.69
0.23
1.04
, *
0.92
-0.58
-1.50
0.81
*
0.92
0.69
1.04
1.50
0.00
3.46 IT
0.46
-0.35
-1.27
*
1.50
-1.73
1.50
0.12
*
0.12
1.62
-1.50
-0.23
3.00
3<&,]i. X
1.15
*
*
control limit
control limit
-------
20/26 EMSL-LV Intel-comparison Study: Radionuclides in Milk, 24- Apr- 1992
Cesium-137
Lab Res. 1 Res. 2
$1
SK
SS 43.0 41.0
T 41.0 42.0
TA 34.0 40.0
TB 33.0 33.0
TH
TH
TI 39.0 42.0
Tit
U 37.0 37.0
W 36.0 41.0
Y 40.0 37.0
Z 40.0 37.0
Exper. Rng anal
Res. 3 Sigma (R + SR)
'
, , ' -
41.0 1.15 0.236
40.0 1.00 0.236
35.0 3.21 0.709
36.0 1.73 0.354
* f
-.
49.0 5.13 1.345
** %
41.0 2.31 0.473
39.0 2.52 0.591
40.0 1.73 0.354
40.0 1.73 0.354
Normalized deviation
Average (grand-avg) (known) Tag
*
, v »
41.67 0.47 0.92
41.00 0.23 0.69
36.33 -1.38 -0.92
34.00 -2.19 -1.73
t- -
' ' , ' - *
43.33 1.04 1.50
' "' . ' ' »
38.33 -0.69 -0.23
38.67 -0.57 -0.12
39.00 -0.46 0.00
39.00 -0.46 0.00
Data sorted by Laboratory Average
Average Tag
27.67 x
32.67
33.33
34.00
34.00
34.33
34.67
34.67
35.33
35.33
35.33
36.00
36.33
36.67
36.67
37.00
37.00
37.33
37.67
38.00
38.33
38.33
38.33
38:67
38.67
39.00
39.00
39.00
= No data submitted
0 s Insufficient data
Lab Average Tag
BG 39.00
AL 39.00
AY 39.00
TB 39.33
PP 39.33
BW 39.33
QK 39.33
MA 39.33
PB 39.67
K 39.67
AZ 39.67
KL 39.67
TA 40.00
GE 40.00
DL 40.00
L 9 40.00
C 40.33
M 40.33
IU 40.67
O 40.67
U 40.67
QL 40.67
AI 41.00
W 41.00
KX 41.00
Z 41.00
Y 41.00
N 41.33
TAG SYMBOLS
Lab Average Tag Lab
DY 41.33 BO
DT 41.33 AA
CP 41.67 SS
Q 41.67 MP
PW 41.67 LR
EL 41.67 EX
CA 41.67 AU
A 42.00 MS
LE 42.00 LF
EH 42.00 1C
D 42.00 DE
BA 42.33 R
I 42.33 CQ
EA 42.33 BM
E 42.67 FE
BL 43.33 TI
NJ 43.33 PV
J 43.33 PM
DM 43.33 MV
BH 43.33 CO
AH 43.67 QB
AF 44.33 FL
T 45.00 DD
MQ 45.67 AN
EB 46.00 AE
AP 46.67 CJ
AK 46.67 BC
ME 47.67 QX
It s Above control limit
x 3 Determined to be an outlier Jl s Below control limit
-------
EMSL-LV Intel-comparison Study: Radionuclides in Milk, 24-Apr-1992 21/26
Cesium-137
Average
Tag
Data sorted by Laboratory Average
Lab Average Tag Lab | Average
Tag
Lab
49.00
tr
NH
49.67
tr
AJ
50.33
54.33
tr
X
JR
QZ
Frequency distribution of responding labs(expected prec. vs known value)
10
oJ-r
exp. prec.
known
value
+2 exp. prec.
Frequency distribution of responding labs(std. dev. vs mean value)
10
^:^Jp^.:::^:
ITT "2 * 0 +2 O+H S1ATT
O-1r-
-6
-4 std. dev.
mean
value
std. dev. +*
= No data submitted
0 s Insufficient data
TAG SYMBOLS
x s Determined to be an outlier
ft & Above control limit
li s Below control limit
-------
EMSL-LV Intel-comparison Study: Radionuclides in Milk, 24-Apr-1992 22/28
Total Potassium Statistical Summary 104 Participants
The known value of this nuclide is 1710.0 mg/I with an expected precision of 86.0; the control limits
are 1560.8 to 1869.2; the warning regions are 1560.8 to 1610.4 and 1809.6 to 1859.2
28(26.9 %) Failed to respond .
8(7.7 %) Outliers '
8(7.7 %) Out of control
but not an outlier
Statistic
52(50.0 %) Within all limits
Respondents
---8(7.7 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
% Coef. of Var.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
1707.92
329.56
108609.13
19.30
-0.12
-0.01
1716.50
0.38
0.02
Grand Avg 1704.01
105.51
11131.94
6.19
-0.35
-0.06
1712.00
0.12
0.02
16(21.1 %) More than 3 norm. S.D..
8(10.5 %) Between 2 and 3 norm. S.D.'
28(36.8 %) Within 1 norm. S.D.
of known value
24(31.6 %) Between 1 and 2 norm. S.D.
-------
23/26 EMSL-LV Intercomparison Study: Radionuclides in Milk, 24- Apr- 1992
Total Potassium
Lab Res. 1 Res. 2
A
AA
AB
AE
AF
AH
AI
AJ
AK
AL
AN
AP
AU
AW
AY
AZ
BA
BC
BG
BH
BL
BM
BO
BW
C
CA
CJ
CO
OF
CQ
D
DD
DE
DL
DM
DT
DY
E
EA
EB
EH
EL
FE
sJX,
=
0 s
1816.0
1759.0
1723.0
1777.0
1538.0
1770.0
1644.0
1720.0
1890.0
1700.0
2204.0
1731.0
1540.0
'
1690.0
1833.0
1810.0
1730.0
2990.0
1708.0
1570.0
1600.0
1789.0
1478.0
1730.0
1660.0
1932.0
; -
1786.0
1790.0
1644.0
1777.0
1840.0
1900.0
1690.0
1860.0
''
1670.0
1763.0
*
.-.-
1649.0
1778.0
1666.0
1770.0
1702.0
1780.0
1860.0
1740.0
,
£U&0
1568.0
1624.0
1740.0
1749.0
1790.0
1688.0
2660.0
1693.0
1620.0
1740.0
1769.0
1460.0
1750.0
1640.0
1947.0
jf f
1763.0
1700.0
1620.0
1763.0
1820.0
1880.0
1830.0
1840.0
Res. 3
1676.0
1731.0
.-
1729.0
1775.0
1723.0
1800.0
1630.0
1720.0
1810.0
1750.0
2227.Q
1835.0
1612.0
'
1690.0
1826.0
1810.0
1757.0
2040.0
1672.0
1640.0
1700.0
1805.0
'
1432.0
1790.0
1560.0
1956.0
f
1741.0
1660.0
1620.0
1763.0
1830.0
1780.0
1800.0
1830.0
'
No data submitted
Insufficient
data
x =
Exper.
Sigma
82.62
17.44
"
-,
44.56
1.53
94.74
17.32
38.18
34.64
40.41
26.46
16.09
134.58
45.43
-
28.87
46.61
11.55
34.77
, 4S2.32
18.08
36.06
72.11
18.04
.
23.18
30.55
52.92
12.12
f ' f
22.50
66.58
13.86
8.08
10.00
64.29
73.71
15.28
Rng anal
(R + SR) Average
1.005
0.220
0.549
0.021
1.515
0.206
0.495
0.412
0.549
0.343
0.213
2.588
0.577
0.343
0.577
0.137
0.474
1U2£
0.247
0.481
0.962
0.247
0.316
0.412
0.687
0.165
0.309
0.893
0.165
0.096
0.137
-
0.824
0.962
0.206
1720.67
1751.00
,.
,
1700.33
1776.67
1642.33
1780.00
1658.67
1740.00
1853.33
'
1730.00
2209.00
1711.33
1592.00
-
1706.67
1802.67
1803.33
1725.00
JK88J&
1691.00
1610.00
1680.00
1787.67
1456.67
1756.67
1620.00
1945.00
1763.33
1716.67
1628.00
1767.67
1830.00
1853.33
1773.33
1843.33
TAG SYMBOLS
Determined
to be an
outlier
Normalized deviation
(grand-avg) (known) Tag
0.34
0.95
'
, ,* .. .;
-0.07
1.46
-1.24
1.53
-0.91
0.72
3.01
'
0.52
' , *
10J7
0.15
-2.26
0.05
1.99
2.00
0.42
17J1
-0.26
-1.89
-0.48
1.68
-4.98
1.06
-1.69
4.85
*
1.19
0.25
-1.53
1.28
2.54
3.01
1.40
2.81
ft s Above
Ji s Below
0.21
0.83
' - «
',,,;,- .. *
-0.19
1.34
-1.36
1.41
-1.03
0.60
2.89
* :
0.40
' " " *
10.05 x
0.03
-2.38
. *
-0.07
1.87
1.88
0.30
IT.lt x
-0.38
-2.01
-0.60
1.56
* \
-5.10 U
0.94
-1.81
4.73 ft
*
1.07
0.13
-1.65
1.16
2.42
*
2.89
1.28
2.69
«
control limit
control limit
-------
EMSL-LV Intel-comparison Study : Radionuclides in Milk, 24-Apr-1992 24/26
Total Potassium
Lab
0IS
I
1C
IU
J
JR
J8
K
KL
KX
L
LE
LF
LM
LR
M
MA
ME
ML
MP
MQ
MS
MV
N
NH
O
PB
P0
PM
PP
PV
PW
EY
Q
QB
QK
QL
QX
QZ
R
Res. 1
Res. 2
Res. 3
Exper.
Sigma
Rnganal
(R + SR)
Normalized deviation
Average
(grand-avg)
(known) Tag
- ' /"V;~'^ '?-'{ " * -'? ' '' ' 'S' /' ''%''-', - ;{ - '; --".. '-"-, ->'''p .''^rx';T;'>^/v -?,"..' V ,*
.^ * *
1804.0
2028.0
1625.0
1739.0
1710.0
', , ''
,2229.0
1582.0
1530.0
1630.0
/ 20,0-' '
1800.0
2410.0 -
1630.0
1549.0
1729.0
' > ' J> ,
1287.0
1796.0
1370.0
1776.0
1641.0
\227$:0\
1644.0
1750.0
/ , S
1780.0
\ is$.o ,-
1628.0
1666.0
' ' / ' A
1585.0
1800.0
1690.0
1420.0
1682.0
'
1614.0
, > '/'' '', ;
1806.0
1896.0
1720.0
1727.0
1700.0
'
2255.0
1570.0
1570.0
1610.0
' lB*0*i
1600.0
f ''f
,5^92,0
1580.0
1560.0
1784.0
,
1576.0
1845.0
1371.0
1648.0
1705.0
2290.0
1655.0
1745.0
'
1670.0
; '' 160^ -
1691.0
1649.0
'> /''
1602.0
1760.0
1634.0
1450.0
1743.0
1606.0
' ^
1762.0
2002.0
1720.0
1765.0
1670.0
'
2219.0
1665.0
1590.0
1690.0
V'"w»o
170o!p
'';<: s ''' , ,'
2153.0
1650.0
1543.0
1912.0
1552.0
1750.0
1451.0
1824.0
1691.0
'2242,0
1655.0
1755.0
'-'/, ' '' ;
1710.0
;;V-i$1.0,
1661.0
1649.0
fff S ' f
1690.0
1680.0
1627.0
1440.0
1713.0
v
1672.0
'
24.85
69.92
54.85
19.43
20.82
. 18.5S
51.73
30.55
41.63
1.00
100.00
146,41
36.06
8.62
93.90
160.38
47.51
46.48
90.98
33.65
24.98
6.35
5.00
'
55.68
153
31.51
9.81
56.36
61.10
34.53
15.28
30.50
36.02
' - ',
0.302
0.907
0.652
0.261
0.275
'
0*247
0.652
0.412
0.549
0#14
1.712
' ;
2.536
0.481
0.117
1.489
,
2.876
0.652
0.556
1.398
0.440
0.330
0.076
0.069
..
0.756
0.021
0.433
0.117
'
0.721
0.824
0.433
0.206
0.419
0.453
' ' ' '' ' ' ,
1790.67
1975.33
1688.33
1743.67
1693.33
' * '
2234*33
1605.67
1563.33
1643.33
&*00 ',
1700.00
f fff
^^)^i/v tt^fe
1620.00
1550.67
1808.33
"
1471.67
1797.00
1397.33
1749.33
1679.00
2270.00
1651.33
1750.00
, ''
1720.00
V"l«9.$7 -,
1660.00
1654.67
,
1625.67
1746.67
1650.33
1436.67
1712.67
1630.67
' ,/ fy" ;,,' '
1.75
5.46
-0.32
0.80
-0.22
'
I&68
-1.98
-2.83
-1.22
v ,*3&94
-0.08
" '",' "*' ' ''
* , 12^41 ' ,
-1.69
-3.09
2.10
-4.68
1.87
-6.18
0.91
-0.50
11.40
-1.06
0.93
0.32
'' '4ixto '~~
-0.89
-0.99
' '
-1.58
0.86
-1.08
-5.38
0.17
-1.48
Bit' '' -'>''' - ' -
& ',
=
0
/
^ ' ''
,
No data submitted
Insufficient
data
X s
'
r
TAG SYMBOLS
Determined
to be an outlier
' '
;";.>/, ' ',
1.62
5.34 IT
-0.44
0.68
-0.34
4 f / _
m00 x
-2.10
-2.95
-1.34
-3406 x
-0.20
, ' +
1 41 *^llk w
* Jj ^jj | jjy^j y%
-1.81
-3.21 li
1.98
-4.80 "I"
1.75
-6.30 U
0.79
-0.62
11.28 x
,. A
-1.18
0.81
*
0.20
$£**'- x
-1.01
-1.11
*
-1.70
0.74
-1.20
-5.50 H
0.05
-1.60
*
*
ft s Above control limit
li s Below control limit
-------
25/26 EMSL-LV Intel-comparison Study:
Radionuclides in Milk, 24- Apr- 1992
Total Potassium
Lab Res. 1
:£''''"Yr
SS 1740.0
T 1610.0
TA 1840.0
TB 1600.0
TB
TH
TI 2140$
TK:
U 1673.0
W 1692.0
Y 1750.0
Z ' 1725.0
Res. 2
'"'< " ' ',"
1640.0
1690.0
1860.0
1750.0
18804
1685.0
1680.0
1650.0
1686.0
Exper.
Res. 3 Sigma
',' "f,''f ""', ' "'"' > " ' ,'
1670.0 51.32
1720.0 56.86
1900.0 30.55
1570.0 96.44
"
*!
241010 280*24
1746.0 39.15
1847.0 93.15
1760.0 60.83
1738.0 27.06
Rng anal Normalized deviation
(R + SR) Average (grand-avg) (known)
*" °" j fff fJ f . J f fV+fffi f f f*$X f " *%> -^ Sf '
0.687 1683.33 -0.42 -0.54
0.756 1673.33 -0.62 -0.74
0.412 1866.67 3.28 3.16
1.450 1640.00 -1.29 -1.41
'
'
6.421 2133.33 $*
-------
EMSL-LV Intel-comparison Study: Radionuclides in Milk, 24-Apr-1992 26/26
Total Potassium
% Frequency distribution of responding labs(expected prec. vs known value)
10-
-6 -4 exp.prec. -2 kn^wn +2 exp'prec' ^
value
% Frequency distribution of responding labs(std. dev. vs mean value)
10-
:* '4 std. dev. -2 mO^ +2 std. dev.
value
------- |