EPA
United States
Environmental Protection
Agency
Environmental Monitoring
Systems Laboratory
P.O. Box 93478
Las Vegas NV 89193-3478
EPA/600/R-92/250
December 1392
Research and Development
Radionuclides in Milk
Intercomparison Study
A Statistical Evaluation of the
September 25,1992 Data
5514GR92NRO.COV-7
-------
Radionuclides in Milk
Intercomparison Study
September 25, 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 Radionuclldes in Milk; September 25, 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.
-------
EM8L-LV Intel-comparison Study: Radionuclides in Milk, 25-Sep-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
winning 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 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
Cf Jculated quantities. An entry that is shaded has been rejected because of one of the reasons
lifted 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
e:q>ected 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.
-------
EMSL-LV Intel-comparison Study: Radionuclides in Milk, 25-Sep-1992 2/26
Strontium-89
Statistical Summary
104 Participants
The known value of this nuclide is 15.0 pCi/1 with an expected precision of 5.0; the control limits
are 6.3 to 23.7; the warning regions are 6.3 to 9.2 and 20.8 to 23.7
65(62.5 %) Failed to respond ,
3(2.9 %) Out of control
but not an outlier
Statistic
, 32(30.8 %) Within all limits
Respondents
* 4(3.8 %) 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
13.71
4.30
18.49
31.36
-8.60
-0.30
13.00
-13.33
-0.47
Grand Avg 13.71
4.30
18.49
31.36
-8.60
-0.30
13.00
-13.33
-0.47
3(7.7 %) More than 3 norm. S.D.
4(10.3 %) Between 2 and 3 norm. S.D
.17(43.6 %) Within 1 norm. S.D.
of known value
15(38.5 %) Between 1 and 2 norm. S.D.
-------
3/26 EMSL-LV Intel-comparison Study : Radionuclides in Milk, 25-8ep-1992
Strontium-89
Lab
A
AA
AE
AF
AH
AI
AK
AL
AK
AF
Atr
AY
AZ
BA
BO
BG
BH
BL
BM
BO
BW
C
CA
CJ
CO
OF
Ot&
D
DE
in*
DM
DT
»Y
E
KA
f£fl
fffftfip
EL
EX
FE
35
B*T
I
Res. 1
16.0
19.0
19.0
20.0
_,
12.0
.
15.0
9.0
14.0
18.0
13.0
16.0
.
12.0
4.0
' ' .
'
11.0
14.0
15.0
12.0
6.0
Res. 2
16.0
18.0
19.0
21.0
9.0
15.0
14.0
16.0
18.0
10.0
18.0
.
12.0
5.0
'
^ "'
9.0
12.0
13.0
12.0
6.0
Res. 3
14.0
16.0
35.0
19.0
-
-
11.0
'
16.0
12.0
15.0
17.0
10.0
14.0
j- ' f f
13.0
5.0
- - *"!
' ' 'G
11.0
*
10.0
14.0
12.0
-
6.0
s No data submitted
0 B
Insufficient
data
X 3
Exper.
Sigma
1.15
1.53
..
9.24
1.00
'
'
1.53
*
0.58
2.52
1.00
0.58
1.73
2.00
.. ..
0.58
0.58
'r'j'/''f
-<'", '", < ' '
1.15
2.00
1.00
0.00
0.00
Rnganal
(R + SR)
0.236
0.354
2.695
0.236
0.354
0.118
0.591
0.236
0.118
0.354
0.473
0.118
0.118
0.236
0.473
0.236
0.000
0.000
Normalized deviation
Average
15.33
17.67
24.33
20.00
-
'
*
10.67
15.33
11.67
15.00
17.67
11.00
16.00
12.33
4.67
10.33
12.00
14.00
12.00
6.00
TAG SYMBOLS
Determined
to be an outlier
(grand-avg) (known) Tag
0.56
1.37
3.68
2.18
*
s
-1.05
0.56
-0.71
0.45
1.37
-0.94
0.79
*
-0.48
-3.13
-1.17
-0.59
0.10
0.59
-2.67
IT s Above
JJ 3 Below
0.12
»
0.92
*
.
3.23 IT
1.73
«
*
»
*
*
*
-1.50
*
«
0.12
-1.15
" *
0.00
*
0.92
-1.39
0.35
»
*
#
-0.92
-3.58 Jl
*
«
-1.62
*
-1.04
*
*
-0.35
«
-1.04
.
-3.12 li
«
control limit
control limit
-------
EMSL-LV Intercomparison Study: Radionuclides in Milk,
Strontium-89
Lab Res. 1
1C
w
J
JR
JS
K
KL
KX
L
LF
UK
M
ME
MP
MQ
MS
MV
N
NJ
o
PB
PC
PB
PM
PP
PV
PW
PY
Q
QB
QK
QJL
QZ
R
RA
EC
RK
RN
S
81
SK
SM
ss
=
0 S
11.0
16.0
16.0
12.0
6.0
18.0
25.0
8.0
9.0
18.0
15.0
11.0
24.0
15.0
16.0
14.0
Res. 2 Res. 3
13.0
..
14.0
-
17.0
12.0
12.0
18.0
13.0
8.0
,
17.0
-
21.0
15.0
11.0
19.0
13.0
13.0
-
12.0
13.0
12.0
16.0
10.0
7.0
18.0
21.0
8.0
o
10.0
17.0
13.0
10.0
22.0
11.0
12.0
12.0
No data submitted
Insufficient
data
x =
25-Sep-1992
4/26 1
Exper. Rng anal Normalized deviation
Sigma (R + SR) Average (grand-avg) (known) Tag
1.15
-
2.00
,
0.58 '
1.15
3.21
0.00
6.11
0.00
4.36
2.08
1.15
0.58
2.52
2.00
2.08
1.15
0.236
0.473
0.118
0.236
0.709
0.000
1.795
0.000
0.945
0.473
0.236
0.118
0.591
0.473
0.473
0.236
12.33
14.00
16.33
11.33
8.33
18.00
19.67
8.00
12.00
,
18.67
14.33
10.67
21.67
13.00
13.67
12.67
TAG SYMBOLS
Determined
to be an
outlier
-0.48
0.10
0.91
-0.82
-1.86
1.49
2.06
-1.98
-0.59
1.72
0.22
-1.05
2.76
-0.25
-0.01
-0.36
ft = Above
li = Below
*
*
-0.92
«
*
*
-0.35
*
*
0.46
*
-1.27
»
-2.31
1.04
*
t
.
*
1.62
-2.42
*
-1.04
*
1.27
-0.23
-1.50
2.31
-0.69
-0.46
»
«
*
-0.81
control limit
control limit
-------
5/26
EMSL-LV Intel-comparison Study: Radionuclides in Milk, 25-Sep-1992
Strontium-89
Lab
T
TA
TB
TE
H
TK
TP
TB
TV
1W
U
w
Y
Exper. Rng anal
Res. 1 Res. 2 Res. 3 Sigma (R + SR)
13.0 12.0 12.0 0.58 0.118
-
19.0 18.0 18.0 0.58 0.118
j f
9.0 10.0 10.0 0.58 0.118
7.0 7.0
7.0 0.00 0,000
17.0 17.0 16.0 0.58 0.118
Normalized deviation
Average (grand-avg) (known)
Tag
12.33 -0.48 -0.92
i
«
»
»
»
18.33 1.60 1.15
*
*
»
9.67 -1.40 -1.85
7.00 -2.32 -2.77
16.67 1.02 0.58
*
Data sorted by Laboratory Average
Average
4.67
6.00
7.00
8.00
8.33
9.67
10.33
10.67
10.67
11.00
11.33
11.67
12.00
Tag Lab
U DE
U. HU
W
PW
NJ
U
DT
R
BA
CA
MQ
BL
Q
Average Tag
12.00
12.00
12.33
12.33
12.33
12.67
13.00
13.67
14.00
14.00
14.33
15.00
15.33
Lab
FE
E
T
J
D
SS
RN
S
KX
EL
QZ
BO
BH
Average Tag
15.33
16.00
16.33
16.67
17.67
17.67
18.00
18.33
18.67
19.67
20.00
21.67
24.33 ft
Lab
A
CJ
ME
Y
C
AE
PB
TP
QK
PV
AK
RK
AI
% Frequency distribution of responding labs(expected prec. vs known value)
10- - -
-6
s No
_ -1 . _ .
-4 exp. prec. -'2 ' ^^ +*
data submitted
0 s Insufficient data
value
TAG SYMBOLS
x s Determined to be an outlier
exp. prec. +4
ft s Above control
tt s Below control
+6
limit
limit
-------
EMSL-LV Intel-comparison Study: Radionuclides in Milk, 25-8ep-1992 6/26
Strontium-89
% Frequency distribution of responding labs(std. dev. vs mean value)
10-
o-i
«lila
I i f TI A * * i i r^ r
-6 -4 std. dev. -2 0^ +2 8td. dev. +* +<
value
-------
EMSL-LV Intel-comparison Study: Hadionuclides in Milk, 25-Sep-1992
7/26
Strontium-90 Statistical Summary 104 Participants
The known value of this nuclide is 15.0 pCi/1 with an expected precision of 5.0; the control limits
are 6.3 to 23.7; the warning regions are 6.3 to 9.2 and 20.8 to 23.7
53(51.0 %) Failed to respond .
3(2.9 %) Outliers
1 (1.0 %) Out of control
but not an outlier
Statistic
. 43(41.3 %) Within all limits
Respondents
"4(3.8 %) 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
13.22
4.15
17.22
31.38
-11.85
-0.43
13.00
-13.33
-0.48
Grand Avg 12.82
2.71
7.33
21.12
-14.54
-0.81
13.00
-13.33
-0.74
4(7.8 %) More than 3 norm. S.D.
4(7.8 %) Between 2 and 3 norm. S.D.'
; 31(60.8 %) Within 1 norm. S.D.
t
of known value
12(23.5 %) Between 1 and 2 norm. S.D.
-------
8/26 EMSL-LV Intel-comparison Study: Radionuclides in Milk,
Strontium-90
Lab Res. 1
A
AA
AE
AF
AH
AI
AK
AL
AN
AF
AU
AY
AZ
BA
BO
BG
BH
BL
EM
BO
BW
C
CA
CJ
CO
OP
i cm
D
DD
DE
PL
DM
DT
E
MA
EB
EH
EL
FE
FL
HU
I
14.0
14.0
8.0
14.0
14.0
15.0
16.0
12.0
14.0
12.0
14.0
15.0
16.0
13.0
12.0
13.0
14.0
19.0
14.0
7.0
7.0
15.0
15.0
13.0
10.0
Res. 2
14.0
11.0
15.0
15.0
14.0
14.0
15.0
12.0
14.0
12.0
'
15.0
13.0
13.0
13.0
13.0
13.0
12.0
18.0
14.0
-
7.0
"" ,
8.0
15.0
15.0
14.0
13.0
Res. 3
15.0
13.0
10.0
15.0
11.0
13.0
16.0
*
13.0
14.0
12.0
16.0
13.0
14.0
12.0
11.0
12.0
12.0
19.0
14.0
8.0
. s
. ' '
8.0
14.0
16.0
15.0
13.0
= No data submitted
0 =
Insufficient
data
x =
Exper.
Sigma
0.58
1.53
3.61
0.58
1.73
1.00
0.58
0.58
0.00
0.00
1.00
1.15
1.53
0.58
'
1.00
0.58
1.15
0.58
0.00
0.58
'
0.58
0.58
0.58
1.00
1.73
25-Sep-1992
Rng anal Normalized deviation
(R + SR) Average (grand-avg) (known) Tag
0.118
0.354
0.827
0.118
0.354
0.236
0.118
0..118
0.000
0.000
0.236
0.236
0.354
0.118
0.236
0.118
0.236
0.118
0.000
0.118
0.118
0.118
0.118
0.236
0.354
14.33
12.67
11.00
14.67
13.00
14.00
15.67
12.33
14.00
12.00
15.00
13.67
14.33
12.67
12.00
12.67
12.67
18.67
14.00
7.33
7.67
14.67
15.33
14.00
12.00
TAG SYMBOLS
Determined
to be an
outlier
0.52
-0.05
-0.63
0.64
0.06
0.41
0.99
-0.17
0.41
-0.28
0.76
0.29
0.52
-0.05
-0.28
-0.05
-0.05
2.03
0.41
-1.90
-1.78
0.64
0.87
0.41
-0.28
ft s Above
U 3 Below
-0.23
-0.81
-1.39
-0.12
*
-0.69
-0.35
0.23
»
«
-0.92
-0.35
-1.04
»
0.00
-0.46
-0.23
"«
-0.81
«
-1.04
-0.81
-0.81
1.27
*
* -
-0.35
*
-2.66
*
-2.54
-0.12
*
0.12
-0.35
;
-1.04
«
control limit
control limit
-------
EMSL-LV Intel-comparison Study: Radionuclides in Milk,
Strontium-90
Lab Res. 1
1C
ro
j
JR
JS
K
KL
KX
L
LF
LM
M
ME
MP
MQ
TMtSS
IVJua
MV
N
NJ
O
PB
PC
PE
PM
PP
PT
pv
PW
Q
Qfc
QK
QL
QZ
R
RA
RC
RK
RN
S
81
SK
SM
ss
=
0 a
V4==
'
17.0
16.0
16.0
15.0
13.0
-
-
*£
14.0
m.o
15.0
-
26.0
10.0
18.0
14.0
8.0
11.0
11.0
5.0
9.0
8.0
10.0
14.0
Res. 2 Res. 3
18.0
13.0
13.0
*
15.0
*
13.0
4fi
15.0
30.0
17.0
30.0
10.0
15.0
% *°
14.0
6.0
12.0
12.0
5.0
10.0
8.0
11.0
15.0
16.0
14.0
15.0
15.0
13.0
3.0
%
14.0
27.0
18.0
27;0
10.0
18.0
'
15.0
6.0
11.0
11.0
6.0
10.0
11.0
12.0
-
15.0
No data submitted
Insufficient
data
X S
25-8ep-1992
9/26
Exper. Rng anal Normalized deviation
Sigma (R + SR) Average (grand-avg) (known) Tag
1.00
1.53
1.53
>
0.00
0.00
0,55
0.58
2,06
1.53
2,08
0.00
1.73
"
0.58
1.15
0.58
0.58
0.58
0.58
1.73
1.00
0.58
0.236
*"
0.354
0.354
0.000
0.000
0.118
0.118
0.473
0.354
0.473
0.000
0.354
0.118
0.236
0.118
0.118
0.118
0.118
0.354
0.236
0.118
17.00
14.33
14.67
15.00
13.00
3.67
14.33
4
27.67
16.67
27.67
10.00
17.00
14.33
6.67
11.33
11.33
5.33
9.67
9.00
11.00
14.67
TAG SYMBOLS
Determined
to be an
outlier
1.45
0.52
0.64
0.76
0.06
-
-3,1?
0.52
6.14
1.33
5.14
-0.98
1.45
0.52
-2.13
-0.51
-0.51
-2.59
-1.09
-1.32
-0.63
0.64
ft = Above
11 = Below
t
0.69
*
*
*
-0.23
-0.12
0.00
-0.69
!
*
3193 X
-0.23
*
4.39 x
0.58
*
4.39 x
-1.73
0.69
*
-0.23
-2.89
-1.27
-1.27
-3.35 li
-1.85
-2.08
-1.39
-0.12
control limit
control limit
-------
10/26
EMSL-LV Inter-comparison Study: Radionuclides in Milk, 25-8ep-1992
Strontium-90
Lab
T
TA
TB
TE
13
TK
TP
TS
TV
U
W
Y
Z
Exper. Rng anal
Res. 1 Res. 2 Res. 3 Sigma (R + SR)
11.0 12.0 11.0 0.58 0.118
*
'
'
13.0 12.0 12.0 0.58 0.118
9.0 11.0 11.0 1.15 0.236
12.0 13.0 13.0 0.58 0.118
13.0 13.0 13.0 0.00 0.000
Normalized deviation
Average (grand-avg) (known)
11.33 -0.51 -1.27
12.33 -0.17 -0.92
10.33 -0.86 -1.62
12.67 -0.05 -0.81
13.00 0.06 -0.69
Tag
»
.
*
»
«
«
*
*
Data sorted by Laboratory Average
Average
3.67
5.33
6.67
7.33
7.67
9.00
9.67
10.00
10.33
11.00
11.00
11.33
11.33
11.33
12.00
12.00
12.00
%
10' - -
6
Tag Lab
x NJ
Jl RA
QL
DE
DT
RN
RK
PW
U
S
AE
T
R
QZ
HU
C
BA
Average Tag
12.33
12.33
12.67
12.67
12.67
12.67
12.67
13.00
13.00
13.00
13.67
14.00
14.00
14.00
14.00
14.33
14.33
Lab
TP
AY
W
CJ
CA
BO
AA
Y
MQ
AI
BH
FE
D
AZ
AK
QK
PB
Average Tag
14.33
14.33
14.33
14.67
14.67
14.67
14.67
15.00
15.00
15.33
15.67 .
16.67
17.00
17.00
18.67
27.67 x
27.67 x
Lab
KX
BL
A
SS
L
E
AF
ME
BG
EL
AL
PP
Q
J
CO
PV
PM
Frequency distribution of responding labsf expected prec. vs known value)
-
J
II ll
Illlllll 1
-4 exp. prec. -'2 known
value
|
+2 exp. 'prec. ^
-
= No data submitted TAG SYMBOLS ft s Above control
0 s Insufficient data x = Determined to be an outlier U = Below control
+6
limit
limit
-------
EMSL-LV Intel-comparison Study: Radionuclides in Milk, 25-Sep-1992 11/26
Strontium-90
% Frequency distribution of responding labs(std. dev. vs mean value)
20
10--.
0Jr
-« < std. dev. -2 o +2 8td. dev. +* +*
mean
value
-------
EMSL-LV Intel-comparison Study: Radionuclides in Milk, 25-Sep-1992 12/26
Iodine-131 Statistical Summary 104 Participants
The known value of this nuclide is 100.0 pCi/I with an expected precision of 10.0; the control limits
are 82.7 to 117.3; the warning regions are 82.7 to 88.4 and 111.6 to 117.3
2O(19.2 %) Failed to respond «y
4(3.8 %) Outliers
1 (1.0 %) Out of control'
but not an outlier
Statistic
. 74(71.2 %) Within all limits
Respondents
* 5(4.8 %) 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
102.61 Grand Avg 100.98
14.33 6.67
205.26 44.45
13.96 6.60
2.61 0.98
0.18 0.15
100.67 100.67
0.67 0.67
0.05 0.10
5(6.0 %) More than 3 norm. S.D.
5(6.0 %) Between 2 and 3 norm. S.D.
;47(56.O %) Within 1 norm. S.D.
of known value
27(32.1 %) Between 1 and 2 norm. S.D.
-------
137
26 EMSL-LV Intel-comparison Study : Radionuclides in Milk,
25-Sep-1992
Iodine-131 }
Lab
A
AA
AE
AF
AH
AI
AK
AL
AN
AP
AU
AY
AZ
BA
BC
EG
BE
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
GE
HU
I
Res. 1
93.0
99.0
93.0
103.0
74.0
103.0
94.0
101.0
121.0
97.0
98.0
92.0
106.0
108.0
111.0
99.0
101.0
103.0
96.0
110.0
105.0
112.0
93.0
102.0
102.0
97.0
97.0
113.0
99.0
88.0
99.0
95.0
100.0
102.0
100.0
100.0
109.0
106.0
t&O
110.0
106.0
87.0
116.0
95.0
Res. 2
87.0
103.0
92.0
99.0
78.0
89.0
96.0
100.0
116.0
101.0
97.0
93.0
90.0
96.0
107.0
104.0
100.0
105.0
96.0
110.0
106.0
99.0
107.0
111.0
105.0
101.0
95.0
112.0
99.0
96.0
98.0
88.0
100.0
103.0
101.0
100.0
100.0
106.0
74.0
110.0
107.0
96.0
113.0
97.0
Res. 3
97.0
105.0
95.0
95.0
113.0
91.0
94.0
110.0
101.0
105.0
91.0
83.0
103.0
110.0
99.0
96.0
99.0
97.0
120.0
105.0
118.0
97.0
108.0
102.0
101.0
95.0
113.0
100.0
87.0
97.0
94.0
100.0
100.0
99.0
102.0
96.0
116.0
82.0
100.0
112.0
88.0
110.0
103.0
s No data submitted
0 m
Insufficient
data
x =
Exper. Rng anal Normalized deviation
Sigma (R + SR) Average (grand-avg) (known) Tag
5.03
3.06
1.53
4.00
12.06
2.52
3.79
5.51
2.31
4.36
1.00
11.79
6.03
2.08
2.89
2.65
3.06
0.58
5.77
0.58
9.71
7.21
4.58
1.73
2.31
1.15
0.58
0.58
4.93
1.00
3.79
0.00
1.53
1.00
1.15
6.66
5.77
4.16
5.77
3.21
4.93
3.00
4.16
0.591
0.354
0.177
0.473
1.795
0.295
0.413
0.650
0.236
0.473
0.118
L683
0.709
0.236
0.295
0.295
0.354
0.059
0.591
0.059
1.233
0.827
0.532
0.177
0.236
0.118
0.059
0.059
0.532
0.118
0.413
0.000
0.177
0.118
0.118
0.768
0.591
0.473
0.591
0.354
0.532
0.354
0.473
92.33
102.33
93.33
99.00
101.67
93.67
98.33
115.67
99.67
100.00
92.00
93.00
102.33
109.33
100.67
99.00
102.33
96.33
113.33
105.33
109.67
99.00
107.00
103.00
99.67
95.67
112.67
99.33
90.33
98.00
92.33
100.00
101.67
100.00
100.67
101.67
109.33
7133
106.67
108.33
90.33
113.00
98.33
TAG SYMBOLS
Determined
to be an
outlier
-1.50
0.23
-1.33
-0.34
0.12
-1.27
-0.46
2.54
-0.23
-0.17
-1.56
-1.38
0.23
1.45
-0.05
-0.34
0.23
-0.81
2.14
0.75
1.50
-0.34
1.04
0.35
-0.23
-0.92
2.02
-0.29
-1.84
-0.52
-1.50
-0.17
0.12
-0.17
-0.05
0.12
1.45
-4.10
0.98
1.27
-1.84
2.08
-0.46
IT = Above
11 = Below
-1.33
0.40
-1.15
-0.17
0
0.29
-1.10
-0.29
2.71
-0.06
0.00
-1.39
-1.21
0.40
1.62
0.12
-0.17
0.40
-0.64
2.31
0.92
1.67
-0.17
1.21
0.52
-0.06
-0.75
2.19
-0.12
-1.67
-0.35
-1.33
0.00
0.29
0.00
0.12
0.29
1.62
-3.93 x
1.15
1.44
-1.67
2.25
-0.29
control limit
control limit
-------
EMSL-LV Intel-comparison Study: Radionuclides in Milk, 25-8ep-1992
14 / 26
Iodine-131
Exper. Rng anal
Lab
1C
IU .
J
JR
JS
K
KL
KX
L
LF
Of
M
ME
MP
MQ
MS
MV
N
NJ
0
PB
PC
PB
PM
PP
PT
PV
PW
PT
Q
QH
QK
QL
QK
QZ
R
RA
RC
RK
RN
S
SI
SK
SM
ss
Res. 1
107.0
99.0
102.0
94.0
113.0
114.0
102.0
106.0
94.0
96.0
109.0
99.0
96.0
111.0
124.0
100.0
110.0
97.0
99.0
f
106.0
103.0
90.0
100.0
92.0
V
115.0
81.0
127.0
111.0
97.0
2I1;0
109.0
97.0
Res. 2
107.0
98.0
97.0
95.0
109.0
114.0
101.0
106.0
100.0
95.0
107.0
95.0
107.0
100.0
121.0
101.0
110.0
96.0
105.0
s
99.0
105.0
89.0
101.0
<
88.0
110.0
83.0
ufco
104.0
97.0
209.0
98.0
100.0
Res. 3
104.0
99.0
100.0
101.0
102.0
94.0
99.0
111.0
98.0
96.0
108.0
104.0
106.0
106.0
120.0
102.0
110.0
96.0
102.0
89.0
97.0
96.0
101.0
87.0
. s
102.0
101.0
137.0
98.0
98.0
210.0
95.0
101.0
s No data submitted
a
Insufficient
data
x =
Sigma (R
1.73
0.58
2.52
3.79
5.57
11.55
1.53
2.89
3.06
0.58
1.00,
4.51
6.08
5.51
2.08
1.00
0.00
0.58
3.00
8.54
4.16
3.79
0.58
2.65
6.56
11.02
0.00
6.51
0.58
1.00
7.37
2.08
+ SR)
0.177
0.059
0.295
0.413
0.650
1.345
0.177
0.295
0.354
0.059
0.118
0.532
0.650
0.650
0.236
0.118
0.000
0.059
0.354
1.008
0.473
0.413
0.059
0.295
0.768
1.345
0.000
0.768
0.059
0.11S
0.827
0.236
Average
106.00
98.67
99.67
96.67
108.00
107.33
100.67
107.67
97.33
95.67
108.00
99.33
103.00
105.67
121.67
101.00
110.00
96.33
102.00
98.00
101.67
91.67
100.67
89.00
109.00
88.33
127.00
104.33
97.33
210.00
100.67
99.33
TAG SYMBOLS
Determined to be an outlier
Normalized deviation
(grand-avg) (known) Tag
0.87
-0.40
-0.23
-0.75
1.22
1.10
-0.05
1.16
-0.63
-0.92
1.22
-0.29
0.35
0.81
3.58
0.00
1.56
-0.81
0.18
-0.52
0.12
-1.61
-0.05
-2.08
1.39
-2.19
431
0.58
-0.63
18,88
-0.05
-0.29
It s Above
11 = Below
1.04
-0.23
-0.06
-0.58
1.39
1.27
0.12
1.33
-0.46
-0.75
»
1.39
-0.12
0.52
0.98
3.75 ft
0.17
*
1.73
-0.64
0.35
*
-0.35
0.29
-1.44
0.12
»
-1.91
*
1.56
-2.02
4,68 x
0.75
-0.46
*-
19.05 x
0.12
*
-0.12
control limit
control limit
-------
15 / 26 EMSL-LV Intel-comparison Study:
Iodine-131
Lab Res. 1 Res. 2
T 103.0 100.0
TA 115.0 89.0
TB
TE 94.0 93.0
TI 113.0 124.0
TK
TP 86.0 85.0
TS 126.0 133.0
TV
TW
U 95.0 98.0
W 92.0 95.0
Y 102.0 103.0
Exper.
Res. 3 Sigma
102.0 1.53
105.0 13.11
91.0 1.53
94.0 15.18
97.0 6.66
120.0 6.56
,
109.0 7.37
80.0 7.94
98.0 2.65
Radionuclides in Milk, 25-Sep-1992
Rnganal
(R + SR)
0.177
2.020
0.177
2.470
0.709
0/76S
0.827
0-886
0.295
Normalized deviation
Average (grand-avg) (known)
101.67 0.12 0.29
103.00 0.35 0.52
92.67 -1.44 -1.27
110.33 1.62 1.79
89.33 -2.02 -1.85
130,00 4.33 4.50
100.67 -0.05 0.12
89.00 -2.08 -1.91
101.00 0.00 0.17
1
Tag
*
*
X
*
»
«
Data sorted by Laboratory Average
Average Tag
77.33 x
88.33
89.00
89.00
89.33
90.33
90.33
91.67
92.00
92.33
92.33
92.67
93.00
93.33
93.67
95.67
95.67
96.33
96.33
96.67
97.33
97.33
98.00
98.00
98.33
98.33
98.67
99.00
= No data submitted
0 s Insufficient data
Lab
EX
QL
W
Q
TP
GE
DL
PV
AY
DT
A
TE
AZ
AE
AK
LF
D
O
BO
JR
R
L
PP
DM
I
AL
IU
CJ
Average
99.00
99.00
99.33
99.33
99.33
99.67
99.67
99.67
100.00
100.00
100.00
100.67
100.67
100.67
100.67
100.67
100.67
101.00
101.00
101.67
101.67
101.67
101.67
101.67
102.00
102.33
102.33
102.33
Tag
TAG SYMBOLS
Lab
BL
AF
SS
ME
DE
J
CQ
AP
EA
DY
AU
U
S
PW
KL
EB
BH
Y
MV
T
PT
EH
E
AI
PB
BM
BA
AA
Average Tag
103.00
103.00
103.00
104.33
105.33
105.67
106.00
106.67
107.00
107.33 .
107.67
108.00
108.00
108.33
109.00
109.33
109.33
109.67
110.00
110.33
112.67
113.00
113.33
115.67
121.67 ft
126.00 x
127.00 x
210.00 x
ft = Above control
x s Determined to be an outlier U = Below control
Lab
TA
MP
CP
QZ
C
MQ
1C
FE
CO
K
KX
M
JS
FL
QK
EL
3C
CA
NJ
TI
DD
HU
BW
AN
MS
TS
QX
RN
limit
limit
-------
EMSL-LV Intel-comparison Study: Radionuclides in Milk, 25-Sep-1992 16/26
Iodiine-131
% Frequency distribution of responding labs(expected prec. vs known value)
(Hr
* "4 exp.prec. * known ' ** exp.'prec. *«
value
% Frequency distribution of responding labs(std. dev. vs mean value)
10-
0-i-r
-A -4 8td. dev. -2 ^^ +2 std. dev. +4 +6
value
-------
EMSL-LV Intel-comparison Study: Radionuclides in Milk, 25-Sep-1992 17/26
Cesium-137 Statistical Summary 104 Participants
The known value of this nuclide is 15.0 pCi/1 with an expected precision of 5.0; the control limits
are 6.3 to 23.7; the warning regions are 6.3 to 9.2 and 20.8 to 23.7
14(13.5 %) Failed to respond .,_
1(1.0%) Outliers'
Statistic
; 87(83.7 %) Within all limits
Respondents
2(1.9 %) 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
15.97
2.30
5.29
14.41
6.44
0.42
15.83
5.56
0.36
Grand Avg 16.10
1.93
3.71
11.96
7.34
0.57
16.00
6.67
0.52
1(1.1 %) More than 3 norm. S.D. ».
2(2.2 %) Between 2 and 3 norm. S.D.
.69(76.7 %) Within 1 norm. S.D.
/ of known value
18(2O.O %) Between 1 and 2 norm. S.D.
-------
18/26 EMSL-LV Intel-comparison Study: Radionuclides in Milk,
25.Sep.1992
Cesium-137
Lab
A
AA
AE
AF
AH
AI
AK
AL
AN
AP
AU
AY
AZ
BA
BC
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
GE
HU
I
=
0 s
Res. 1
14.0
13.0
15.0
14.0
15.0
15.0
14.0
18.0
20.0
13.0
16.0
13.0
18.0
19.0
17.0
20.0
15.0
15.0
15.0
19.0
12.0
13.0
15.0
16.0
16.0
16.0
16.0
16.0
18.0
15.0
16.0
13.0
15.0
17.0
13.0
18.0
16.0
17.0
17.0
16.0
16.0
14.0
15.0
17.0
Res. 2
15.0
12.0
15.0
18.0
15.0
19.0
14.0
17.0
20.0
14.0
15.0
13.0
10.0
15.0
17.0
16.0
16.0
16.0
14.0
17.0
12.0
16.0
15.0
16.0
16.0
17.0
15.0
18.0
18.0
14.0
16.0
14.0
15.0
16.0
16.0
18.0
15.0
14.0
17.0
19.0
16.0
14.0
14.0
17.0
Res. 3
16.0
12.0
13.0
17.0
15.0
22.0
13.0
22.0
19.0
14.0
16.0
11.0
16.0
14.0
18.0
'
16.0
15.0
15.0
15.0
14.0
12.0
13.0
17.0
16.0
16.0
. 18.0
15.0
16.0
18.0
14.0
16.0
17.0
16.0
17.0
16.0
15.0
15.0
15.0
16.0
19.0
17.0
15.0
13.0
17.0
No data submitted
Insufficient
data
x s
Exper. Rng anal Normalized deviation
Sigma (R + SR) Average (grand-avg) (known) Tag
1.00
0.58
1.15
2.08
0.00
3.51
0.58
2.65
0.58
0.58
0.58
1.15
4.16
2.65
0.58
2.31
0.58
0.58
0.58
2.52
0.00
1.73
1.15
0.00
0.00
1.00
0.58
1.15
0.00
0.58
0.00
2.08
0.58
0.58
1.73
1.73
0.58
1.53
0.58
1.73
0.58
0.58
1.00
0.00
0.236
0.118
0.236
0.473
0.000
0.827
0.118
0.591
0.118
0.118
0.118
0,236
0.945
0.591
0.118
0.473
0.118
0.118
0.118
0.591
0.000
0.354
0.236
0.000
0.000
0.236
0.118
0.236
0.000
0.118
0.000
0.473
0.118
0.118
0.354
0.354
0.118
0.354
0.118
0.354
0.118
0.118
0.236
0.000
15.00
12.33
14.33
16.33
15.00
18.67
13.67
19.00
19.67
13.67
15.67
12.33
14.67
16.00
17.33
17.33
15.33
15.33
14.67
16.67
12.00
14.00
15.67
16.00
16.00
17.00
15.33
16.67
18.00
14.33
16.00
14.67
15.33
16.67
15.00
17.00
15.33
15.33
16.67
18.00
16.33
14.33
14.00
17.00
TAG SYMBOLS
Determined
to be an
outlier
-0.38
-1.31
-0.61
0.08
-0.38
0.89
-0.84
1.00
1.24
-0.84
-0.15
-1.31
-0.50
-0.04
0.43
0.43
-0.27
-0.27
-0.50
0.20
-1.42
-0.73
-0.15
-0.04
-0.04
0.31
-0.27
0.20
0.66
-0.61
-0.04
-0.50
-0.27
0.20
-0.38
0.31
-0.27
-0.27
0.20
0.66
0.08
-0.61
-0.73
0.31
ft 3 Above
U s Below
0.00
-0.92
-0.23
0.46
0.00
1.27
-0.46
1.39
1.62
-0.46
0.23
-0.92
-0.12
0.35
0.81
0.81
0.12
0.12
-0.12
0.58
-1.04
-0.35
0.23
0.35
0.35
0.69
0.12
0.58
1.04
-0.23
0.35
-0.12
0.12
0.58
0.00
0.69
0.12
0.12
0.58
1.04
0.46
-0.23
-0.35
0.69
control limit
control limit
-------
EMSL-LV Intel-comparison Study: Radionuclides in Milk, 25-Sep-1992
19/26
Cesiuxn-137
Exper. Rng anal
Lab
1C
IU
J
JR
JS
K
KL
KX
L
LF
Of
M
ME
MP
MQ
MS
MV
W .
NJ
O
PB
PC
PM
PP
PT
PV
PW
PY
Q
QB
QK
QL
QX
QZ
R
RA
RC
RK
RN
S
81
SK
SM
ss
s
0 s
Res. 1
15.0
15.0
15.0
15.0
18.0
18.0
15.0
18.0
17.0
16.0
14.0
14.0
19.0
20.0
18.0
16.0
16.0
15.0
15.0
$.0
24.0
22.0
17.0
19.0
14.0
V
16.0
18.0
19.0
16.0
20.0
17.0
17.0
18.0
18.0
18.0
14.0
17.0
Res. 2
15.0
17.0
16.0
16.0
18.0
18.0
17.0
18.0
17.0
14.0
17.0
17.0
17.0
16.0
18.0
16.0
17.0
15.0
15.0
£D
19.0
20.0
15.0
24.0
16.0
s
16.0
22.0
18.0
16.0
21.0
16.0
16.0
19.0
20.0
16.0
14.0
17.0
Res. 3
13.0
17.0
15.0
19.0
18.0
18.0
16.0
18.0
13.0
14.0
15.0
17.0
18.0
18.0
15.0
17.0
16.0
15.0
15.0
4.0
21.0
20.0
14.0
21.0
16.0
18.0
16.0
17.0
18.0
20.0
14.0
15.0
18.0
19.0
12.0
15.0
17.0
No data submitted
Insufficient
data
X 3
Sigma (R
1.15
1.15
0.58
2.08
0.00
0.00
1.00
0.00
2.31
1.15
1.53".
1.73
1.00
2.00
1.73
0.58
0.58
0.00
0.00
2.00
2.52
1.15
1.53
2.52
1.15
1.15
3.06
1.00
1.15
0.58
1.53
1.00
0.58
1.00
3.06
0.58
0.00
+ SR)
0.236
0.236
0.118
0.473
0.000
0.000
0.236
0.000
0.473
0.236
0.354
0.354
0.236
0.473
0.354
0.118
0.118
0.000
0.000
0.473
0.591
0.236
0.354
0.591
0.236
0.236
0.709
0.236
0.236
0.118
0.354
0.236
0.118
0.236
0.709
0.118
0.000
Average
14.33
16.33
15.33
16.67
18.00
18.00
16.00
18.00
15.67
14.67
15.33
16.00
18.00
18.00
17.00
16.33
16.33
15.00
15.00
4.00
21.33
20.67
15.33
21.33
15.33
16.67
18.67
18.00
16.67
20.33
15.67
16.00
18.33
19.00
15.33
14.33
17.00
TAG SYMBOLS
Determined to be an outlier
Normalized deviation
(grand-avg) (known) Tag
-0.61
0.08
-0.27
0.20
0.66
0.66
-0.04
0.66
-0.15
-0.50
-0.27
-0.04
0.66
0.66
0.31
0.08
0.08
-0.38
-0.38
-4.19
1.81
1.58
-0.27
1.81
-0.27
0.20
0.89
0.66
0.20
1.47
-0.15
-0.04
0.77
1.00
-0.27
-0.61
0.31
ft 3 Above
U 3 Below
-0.23
0.46
0.12
0.58
1.04
1.04
0.35
1.04
0.23
-0.12
0.12
0.35
1.04
1.04
0.69
0.46
*
0.46
0.00
0.00
-3,81 x
2.19
1.96
0.12
2.19
0.12
0.58
1.27
1.04
0.58
1.85
0.23
0.35
1.15
1.39
0.12
-0.23
0.69
control limit
control limit
-------
20/26
Cesium
Lab
T
TA
TB
TE
TI
TK
TP
TS
TV
TW
U
W
Y
2J
EMSL-LV Intercomparison Study:
137
Res. 1 Res. 2
17.0 16.0
18.0 21.0
11.0 17.0
12.0 16.0
14.0 14.0
13.0 14.0
14.0 16.0
13.0 12.0
15.0 15.0
Exper.
Res. 3 Sigma
14.0 1.53
19.0 1.53
14.0 3.00
12.0 2.31
14.0 0.00
15.0 1.00
15.0 1.00
14.0 1.00
15.0 0.00
Radionuclides in Milk, 25-8ep-1992
Rnganal
(R + SR)
0.354
0.354
0.709
0.473
0.000
0.236
0.236
0.236
0.000
Normalized deviation
Average (grand-avg) (known)
15.67 -0.15 0.23
19.33 1.12 1.50
14.00 -0.73 -0.35
13.33 -0.96 -0.58
14.00 -0.73 -0.35
14.00 -0.73 -0.35
15.00 -0.38 0.00
13.00 -1.07 -0.69
15.00 -0.38 0.00
^
Tag
- «
*
»
»
*
Data sorted by Laboratory Average
Average
4.00
12.00
12.33
12.33
13.00
13.33
13.67
13.67
14.00
14.00
14.00
14.00
14.00
14.33
14.33
14.33
14.33
14.33
14.67
14.67
14.67
14.67
15.00
15.00
15.00
15.00
15.00
15.00
Tag
X
= No data submitted
0 = Insufficient data
Lab
PC
c
AY
AA
W
n
AP
AK
TS
TP
TE
HU
CA
S
1C
GE
DL
AE
LF
DT
BO
AZ
Y
U
PB
0
EA
AH
Average
15.00
15.33
15.33
15.33
15.33
15.33
15.33
15.33
15.33
15.33
15.33
15.33
15.67
15.67
15.67
15.67
15.67
16.00
16.00
16.00
16.00
16.00
16.00
16.00
16.33
16.33
16.33
16.33
Tag
TAG SYMBOLS
Lab
A
RN
PW
PT
M
J
EL
EH
DY
D
BM
BL
T
QZ
L
CJ
AU
R
ME
KL
DM
CP
CO
BA
NJ
MV
IU
FL
Average Tag
16.33
16.67
16.67
16.67
16.67
16.67
16.67
16.67
17.00
17.00
17.00
17.00
17.00
17.33
17.33
18.00
18.00
18.00
18.00
18.00
18.00
18.00
18.00
18.33
18.67
18.67
19.00
19.00
It 3 Above control
x s Determined to be an outlier U = Below control
Lab
JVF
QL
Q
JR
EX
E
DD
BW
SS
MS
I
EB
CQ
BH
BC
QK
MQ
MP
KX
K
JS
FE
DE
RA
QB
AI
RK
AL
limit
limit
-------
EMSL-LV Intel-comparison Study : Radionuclides in Milk, 25-Sep-1992 21/26
Cesi.um.137
Data sorted
Average Tag Lab Average
19.33 TA 20.33
19.67 AN 20.67
by Laboratory Average
Tag Lab Average Tag Lab
QX 21.33 PV
PP 21.33 PM
% Frequency distribution of responding labs(expected prec. vs known value)
10- -----------------------
|
. . . _. 1||-
.llllll.ll..
'* ' ;'4 exp. prec. * ' ^^ ' V2 exp.'prec. +'4 ' +'*
'. value
% Frequency distribution of responding labs(std. dev. vs mean value)
10" ----------
o -
-'* ' -'4 std.'dev. -2
|
+2 std/dev. *4
value
3 No data submitted TAG SYMBOLS ft = Above control limit
0 s Insufficient data x s Determined to be an outlier U & Below control limit
-------
EMSL-LV Latex-comparison Study: Radionuclides in Milk, 25-8ep-1992 22 / 26
Total Potassium Statistical Summary 104 Participants
The known value of this nuclide is 1750.0 mg/1 with an expected precision of 88.0; the control limits
are 1597.3 to 1902.7; the warning regions are 1597.3 to 1648.1 and 1851.9 to 1902.7
26(25.0 %) Failed to respond -,
4(3.8 %) Outliers '
12(11.5 %) Out of control
but not an outlier
Statistic
. 53(51.0 %) Within all limits
Respondents
--- 9(8.7 %) 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
1706.83 Grand Avg 1711.91
282.96 93.26
80063.84 8697.15
16.58 5.45
-2.47 -2.18
-0.15 -0.41
1723.17 1723.17
-1.53 -1.53
-0.09 -0.29
16(20.5 %) More than 3 norm. S.D.,
9(11.5 %) Between 2 and 3 norm. S.D.
,34(43.6 %) Within 1 norm. S.D.
of known value
19(24.4 %) Between 1 and 2 norm. S.D.
-------
23 /
26 EMSL-LV Intel-comparison Study: Radionuclides in Milk, 25-Sep-1992
Total Potassium
Lab
A
AA
AE
AF
AH
AI
AK
AL
AN
AF
AU
AY
AZ
BA
BC
BG
BH
BL
BM
BO
BW
C
CA
CJ
CO
OF
CQ
D
DD
DE
PL
DM
DT
DY
E
EA
EB
EH
EL
EX
FE
WL
HU
I
=
0 5
Res. 1
1611.0
1707.0
1645.0
1759.0
1860.0
1608.0
1790.0
1890.0
1770.0
3122S
1504.0
1612.0
1510.0
1785.0
1710.0
1770.0
3230,0
1732.0
1600.0
1740.0
1766.0
1716.0
1838.0
1670.0
1770.0
s
1700.0
1720.0
1644.0
1737.0
1730.0
1800.0
1740.0
1600.0
1745.0
1755.0
Res. 2
1836.0
1710.0
1768.0
1728.0
1770.0
1605.0
1750.0
1780.0
1780.0
2129.0
1636.0
1528.0
1500.0
1764.0
1740.0
1710.0
3imo
1700.0
1510.0
1670.0
1803.0
1728.0
1800.0
1610^0
1770.0
1690.0
1760.0
1632.0
1729.0
1754.0
1760.0
1710.0
1800.0
1720.0
1748.0
Res. 3
1720.0
1740.0
1768.0
1721.0
1810.0
1540.0
1810.0
1770.0
1800.0
2184.0
1547.0
1648.0
1520.0
1675.0
1670.0
1730.0
3380.0
1740.0
1510.0
1570.0
1851.0
1676.0
1833.0
1700.0
1770.0
'
1730.0
1810.0
1655.0
1776.0
1710.0
1820.0
1770.0
1700.0
1700.0
1753.0
No data submitted
Insufficient
data
X 3
Exper.
Sigma
112.52
18.25
71.01
20.22
45.09
38.42
30.55
66.58
15.28
33.90
67.32
61.58
10.00
58.40
35.12
30.55
135.28
21.17
51.96
85.44
42.62
27.23
20.65
45.83
0.00
'
20.82
45.09
11.50
25.15
22.03
30.55
30.00
100.00
22.55
3.61
Rnganal
(R + SR)
1.972
0.222
0.826
0.255
0.604
0.456
0.403
0.805
0.201
0,416
0.886
0.805
0.134
0.738
0.470
0.403
2.547
0.268
0.604
1.269
0.571
0.349
0.255
0.604
0.000
0.268
0.604
0.154
0.315
0.295
0.403
0.403
1.652
0.302
0.047
Normalized deviation
Average
1722.33
1719.00
1727.00
1736.00
1813.33
1584.33
1783.33
1813.33
1783.33
2146.00
1562.33
1596.00
1510.00
1741.33
1706.67
1736.67
3240.00
1724.00
1540.00
1660.00
1806.67
1706.67
1823.67
1660.00
1770.00
1706.67
1763.33
1643.67
1747.33
1731.33
1793.33
1740.00
1700.00
1721.67
1752.00
TAG SYMBOLS
Determined
to be an outlier
(grand-avg) (known) Tag
0.21
0.14
0.30
0.47
2.00
-2.51
1.41
2.00
'
1.41
8.52
-2.94
-2.28
-3.97
0.58
-0.10
0.49
mm
0.24
-3.38
-1.02
1.87
.-0.10
2.20
-1.02
1.14
-0.10
1.01
-1.34
0.70
0.38
1.60
0.55
-0.23
0.19
0.79
IT 3 Above
U 3 Below
-0.54
-0.61
«
-0.45
-0.28
1.25
-3.26 U
0.66
1.25
»
0.66
7.77 X
-3.69 I
-3.03 U
»
«
-4.72 T
-0.17
-0.85
-0.26
29,33 X
-0.51
-4.13 U
-1.77
1.12
*
-0.85
1.45
-1.77
0.39
#
-0.85
0.26
-2.09
-0.05
-0.37
«
0.85
-0.20
*
-0.98
-0.56
0.04
control limit
control limit
-------
EMSL-LV Intercomparison Study: Radionuclides in Milk,
Total Potassium
Lab Res. 1 Res. 2
1C
IU
J
JR
JS
K
KL
KX
L
LF
Ut
M
ME
MP
MQ
MS
MV
N
NtT
O
PB
PC
PB
PM
PP
PT
PV
PW
FY
Q
QB
QK
QL
ox
R
RA
EC
RK
RN
S
81
SK
SM
ss
1649.0
1710.0
1722.0
1680.0
1755.0
1931.0
1777.0
1780.0
1795.0
1700.0
1560.0
1560.0
1619.0
1813.0
1824.0
1690.0
1735.0
$07.0
1650.0
1828.0
1592.0
1575.0
1676.0
1633.0
1760.0
1891.0
1710.0
1577.0
1639.0
1742.0
1755.0
1965.0
1660.0
1653.0
1897.0
1680.0
1737.0
1640.0
1869.0
1810.0
1766.0
1790.0
1600.0
1700.0
1500.0
1530.0
1737.0
1773.0
1784.0
1690.0
1720.0
mo
-
1540.0
1806.0
1553.0
1650.0
1640.0
"
1626.0
1830.0
1825.0
1640.0
1563.0
1678.0
1860.0
1968.0
1769.0
1680.0
1607.0
Res. 3
1806.0
1720.0
1731.0
1610.0
1860.0
1837.0
1801.0
1770.0
1640.0
1700.0
.
1660.0
1480.0
1965.0
1789.0
1800.0
1690.0
1771.0
mo
1580.0
1884.0
1535.0
1620.0
1654.0
-"
1663.0
1830.0
1760.0
1600.0
1581.0
1663.0
1836.0
1862.0
1932.0
1710.0
1715.0
s No data submitted
0 3
Insufficient
data
X 3
25-Sep-1992
24
Exper. Rng anal Normalized deviation
Sigma (R + SR) Average (grand-avg) (known)
125.46
20.82
7.55
35.12
63.38
63.52
17.90
10.00
103.00
0.00
-
80.83.
40.41
175.89
20.13
20.13
0.00
26.21
13 JO
55.68
40.22
29.14
37.75
18.15
19.66
40.41
65.50
55.68
9.45
19.67
62.36
106.50
104.94
25.17
54.20
2.266
0.268
0.101
0.470
0.765
0.812
0.235
0.134
1.588
0.000
1.141
0.537
3.519
0.268
0.268
0.000
0.342
o.m
0.738
0.524
0.383
0.503
0.242
0.248
0.470
0.879
0.738
0.121
0.262
0.792
1.818
1.601
0.336
0.725
1784.00
1703.33
1730.00
1643.33
1828.00
1859.33
1781.33
1780.00
1678.33
1700.00
1573.33
1523.33
1773.67
1791.67
1802.67
1690.00
1742.00
1.42
-0.17
0.36
-1.35
2.28
2.90
1.37
1.34
-0.66
-0.23
-2.73
-3.71
1.22
1.57
1.79
-0.43
0.59
0.67
-0.92
-0.39
-2.10
1.54
2.15
0.62
0.59
-1.41
-0.98
-3.48
-4.46
0.47
0.82
1.04
-1.18
-0.16
19&07 ZSLSfl -30.63
1590.00
1839.33
1560.00
1615.00
1656.67
1640.67
1806.67
1825.33
1650.00
1573.67
1660.00
1812.67
1861.67
1888.67
1683.33
1658.33
TAG SYMBOLS
Determined
to be an
outlier
-2.40
2.51
-2.99
-1.91
-1.09
-1.40
1.87
2.23
-1.22
-2.72
-1.02
1.98
2.95
3.48
-0.56
-1.05
IT = Above
JJ. s Below
-3.15
1.76
-3.74
-2.66
-1.84
-2.15
1.12
1.48
-1.97
-3.47
-1.77
1.23
2.20
2.73
-1.31
-1.80
control
control
/28
Tag
11
.
.......
*
«
X
*
11
li
»
^
':. I-*
'
limit
limit
-------
VI
25/26 EMSL-LV Intel-comparison Study : Radionuclides in Milk, 25-Sep-1992
Total Potassium
Lab Res. 1
T 1732.0
TA 1590.0
TB
TE 846.0
TI 1875.0
TE
TP 1530.0
TS 1510.0
TV
TW
U 1746.0
W 1744.0
Y 1760.0
Res. 2
1766.0
1630.0
890,0
1824.0
1550.0
1510.0
-
1685.0
1634.0
1670.0
Exper. Rng anal
Res. 3 Sigma (R + SR)
1684.0 41.20 0.550
1630.0 23.09 0.268
878.0 20.42 0.336
1991.0 85.58 1.230
1560.0 15.28 0.201
1500.0 5.77 0.067
1710.0 30.66 0.409
1768.0 71.45 0.899
1750.0 49.33 0.604
Normalized deviation
Average (grand-avg) (known)
1727.33 0.30 -0.45
1616.67 -1.87 -2.62
«72J7 -18J0 47.27
1896.67 3.64 2.89
1546.67 -3.25 -4.00
1506.67 -4.04 -4.79
'
1713.67 0.03 -0.72
1715.33 0.07 -0.68
1726.67 0.29 -0.46
Tag
«
X
«
U
^
*
»
.
Data sorted by Laboratory Average
Average
193.67
872.67
1506.67
1510.00
1523.33
1540.00
1546.67
1560.00
1562.33
1573.33
1573.67
1584.33
1590.00
1596.00
1615.00
1616.67
1640.67
1643.33
1643.67
1650.00
1656.67
1658.33
1660.00
1660.00
1660.00
1678.33
Tag
x
x
II
II
II
II
II
||
II
II
II
H
II
||
s No data submitted
0 s Insufficient data
Lab
PC
TE
TS
BH
MP
CA
TP
PT
AZ
M
QX
AK
PM
BA
PV
TA
Q
JR
DY
QL
PW
ss
R
DD
CJ
L
Average Tag
1683.33
1690.00
1700.00
1700.00
1703.33
1706.67
1706.67
1706.67
1713.67
1715.33
1719.00
1721.67
1722.33
1724.00
1726.67
1727.00
1727.33
1730.00
1731.33
1736.00
1736.67
1740.00
1741.33
1742.00
1747.33
1752.00
Lab
S
O
LF
FE
IU
DM
CQ
BM
U
W
AA
HU
A
C
Y
AF
T
J
EA
AH
BO
EL
BL
PB
E
I
Average Tag
1763.33
1770.00
1773.67
1780.00
1781.33
1783.33
1783.33
1784.00
1791.67
1793.33
1802.67
1806.67
1806.67
1812.67
1813.33
1813.33
1823.67
1825.33
1828.00
1839.33
1859.33
1861.67
1888.67
1896.67
2145.00 x
3240.00 x
TAG SYMBOLS ft s Above control
x = Determined to be an outlier U = Below control
Lab
DT
DE
MQ
KX
KL
AU
AL
1C
MS
EH
MV
QB
CO
RA
AN
AI
D
QK
JS
PP
K
RK
RN
TI
AY
BW
limit
limit
-------
EMSL-LV Intel-comparison Study: Radionuclides in Milk, 25-Sep-1992 26/26
Totiil Potassium
% Frequency distribution of responding labs(expected prec. vs known value)
0J
-ft 1-
^
-4 -4 exp.prec. '2 j^O^ +2 exp. prec.
value
% Frequency distribution of responding labs(std. dev. vs mean value)
10-
-* -* std. dev. -2 0 *2 std. dev. +4
mean
value
------- |