United States
Environmental Protection
\r ^1 M^k. Agency
Office of Water
www.epa.gov	July 1998
Method 1671, Revision A: Volatile
Organic Compounds Specific to
the Pharmaceutical
Manufacturing Industry by GC/FID

Method 1671
Volatile Organic Compounds Specific to the Pharmaceutical
Manufacturing Industry by GC/FID
Revision A, July 1998

Method 1671, Revision A
Volatile Organic Compounds Specific to the Pharmaceutical
Manufacturing Industry by GC/FID
1.0	Scope and Application
1.1	This method is for surveying and monitoring under the Clean Water Act. The method is used to
determine certain non-purgeable volatile organic pollutants specific to the pharmaceutical
manufacturing industry (PMI) that are amenable to direct aqueous injection gas chromatography
(GC) and detection by a flame ionization detector (FID).
1.2	The PMI analytes listed in Table 1 may be determined in waters, soils, and municipal sludges by this
1.3	The detection limits of Method 1671 are usually dependent on the level of interferences rather than
instrumental limitations. The minimum levels (MLs) in Table 2 are the level that can be attained
with no interferences present.
1.4	This method is recommended for use by, or under the supervision of, analysts experienced in the
operation of gas chromatographs and in the interpretation of chromatograms.
1.5	This method is performance-based. The analyst is permitted to modify the method to overcome
interferences or to lower the cost of measurements, provided that all performance criteria in this
method are met. The requirements for establishing method equivalency are given in Section 9.2.
2.0	Summary of the Method
2.1	The percent solids content of the sample is determined. If the solids content is less than 1%, an
internal standard(s) is added to a 5-mL sample. If the solids content of the sample is greater than
1%, 5 mL of reagent water and an internal standard(s) is added to a 5-g aliquot of sample.
The mixture is sonicated in a centrifuge tube with little or no headspace for 5 minutes. During this
period the analytes and the internal standard will equilibrate between the solid and aqueous phases.
In some cases, additional sonication will be necessary to establish equilibrium. The resulting
suspension is centrifuged and the supernatant liquid analyzed.
2.2	An appropriate amount of the aqueous solution (or supernate) is injected into the GC. The
compounds are separated by the GC and detected by the FID.
3.0 Definitions
There are no definitions specific to this method.

Method 1671, Revision A
4.0	Interferences
4.1	Impurities in the carrier gas, organic compounds outgassing from the GC plumbing, and solvent
vapors in the laboratory account for the majority of contamination problems encountered with this
method. The analytical system is demonstrated to be free from interferences under conditions of the
analysis by analyzing reagent water blanks initially and with each sample batch (samples analyzed
on the same 12-hour shift), as described in Section 9.4.
4.2	Samples can be contaminated by diffusion of volatile organic compounds through the bottle seal
during shipment and storage. A field blank prepared from reagent water and carried through the
sampling and handling protocol may serve as a check on such contamination.
4.3	Contamination by carryover can occur when high-level and low-level samples are analyzed
sequentially. To reduce carryover, the syringe is cleaned or replaced with a new syringe after each
sample is analyzed. When an unusually concentrated sample is encountered, it is followed by
analysis of a reagent water blank to check for carryover. Syringes are cleaned by washing with soap
solution, rinsing with tap and distilled water, and drying in an oven at 100-125 °C. Other parts of
the system are also subject to contamination; therefore, frequent bakeout and purging of the entire
system may be required.
4.4	Interferences resulting from samples will vary considerably from source to source, depending on the
diversity of the site being sampled.
5.0 Safety
The toxicity or carcinogenicity of each analyte, compound, or reagent used in this method has not
been precisely determined; however, each chemical compound should be treated as a potential health
hazard. Exposure to these compounds should be reduced to the lowest possible level. The
laboratory is responsible for maintaining a current awareness file of OSHA regulations regarding
the safe handling of the chemicals specified in this method. A reference file of material safety data
sheets should also be made available to all personnel involved in these analyses. Additional
information on laboratory safety can be found in References 2-4.
6.0	Equipment and Supplies
6.1	Sample bottles and septa
6.1.1	BottlesS25- to 40-mL with polytetrafluoroethylene (PTFE)-lined screw-cap (Pierce 13075,
or equivalent). Detergent wash, rinse with tap and distilled water, and dry at >105 °C for a
minimum of 1 hour before use.
6.1.2	SeptaSPTFE-faced silicone (Pierce 12722, or equivalent), cleaned as above and baked at
100-200 °C for a minimum of 1 hour.

Method 1671, Revision A	
6.2	Gas chromatographSShall be linearly temperature programmable with initial and final holds, and
shall produce results which meet the calibration (Section 10), quality assurance (Section 9), and
performance tests (Section 13) of this method.
6.2.1	ColumnS30 m long x 0.32 mm i.d. fused-silica microbore column coated with 4-(im of
bonded poly(dimethylpolysiloxane) (Supelco SPB-1 Sulfur, or equivalent).
6.2.2	GC operating conditions.
ColumnS2 minutes at 40°C, 10°C per minute to 180°C.
Injection portS200°C
Carrier gasSHydrogen at a head pressure of 10 psig.
An injector split may be used in order to optimize peak shape and repeatability.
6.3	SyringesS5-mL, gas-tight glass hypodermic, with Luer-lok tips.
6.4	Micro syringesSlO-, 25-, and 100-(iL.
6.5	Syringe valvesS2-way with Luer ends, PTFE.
6.6	BottlesS15-mL, screw-cap with PTFE liner.
6.7	Balances.
6.7.1	Analytical, capable of weighing 0.1 mg.
6.7.2	Top-loading, capable of weighing 10 mg.
6.8	Equipment for determining percent moisture.
6.8.1	Oven, capable of being temperature-controlled at 110 ° C (±5 ° C).
6.8.2	Desiccator.
6.8.3	BeakersS50-, 100-mL.

Method 1671, Revision A
6.9	Centrifuge apparatus.
6.9.1	Centrifuge capable of rotating 10-mL centrifuge tubes at 5000 rpm.
6.9.2	Centrifuge tubes, 10-mL, with screw-caps (PTFE-lined) to fit centrifuge.
6.10	Sonication apparatus capable of sonicating 10-mL centrifuge tubes and thoroughly agitating
7.0	Reagents and Standards
7.1	Reagent water: Water in which the compounds of interest and interfering compounds are not
detected by this method. It may be generated by any of the following methods:
7.1.1	Activated carbonSpass tap water through a carbon bed (Calgon Filtrasorb-300, or
7.1.2	Water purifierSPass tap water through a purifier (Millipore Super Q, or equivalent).
7.1.3	Boil and purgeSHeattap waterto between 90 and 100°C and bubble contaminant-free inert
gas through it for approximately 1 hour. While still hot, transfer the water to screw-cap
bottles and seal with a PTFE-lined cap.
7.2	Sodium thiosulfateSACS granular.
7.3	Standard solutionsSPurchased as solutions or mixtures with certification to their purity,
concentration, and authenticity, or prepared from materials of known purity and composition. If
compound purity is 96% or greater, the weight may be used without correction to calculate the
concentration of the standard.
7.3.1	Place approximately 8 mL of reagent water in a 10-mL ground-glass-stoppered volumetric
flask. Allow the flask to stand unstoppered for approximately 10 minute s or until all wetted
surfaces have dried. For each analyte, weigh the stoppered flask, add the compound,
restopper, then immediately reweigh to prevent evaporation losses from affecting the
7.3.2	LiquidsSUsing amicrosyringe, add sufficient liquid (about 100 mg) sothatthe final solution
will have a concentration of about 10 mg/mL.
7.3.3	GasesSFill a valved 5-mL gas-tight syringe with the compound. Lower the needle to
approximately 5 mm above the meniscus. Slowly introduce the compound above the surface

Method 1671, Revision A
of the meniscus. The gas will dissolve in the solvent. Repeat if necessary to reach desired
Fill the flask to volume, stopper, then mix by inverting several times. Calculate the
concentration in milligrams per milliliter (mg/mL, equivalent to micrograms per microliter
| |_ig/|_iL |) from the weight gain.
Transfer the stock solution to a PTFE-sealed screw-cap bottle. Store, with minimal
headspace, in the dark at approximately 4°C. Do not freeze.
Replace standards after one month, or sooner if comparison with check standards indicate
a change in concentration. Quality control check standards that can be used to determine
the accuracy of calibration standards may be available from the National Institute of
Standards and Technology, Gaithersburg, MD.
7.4 Secondary standardsSUsing standard solutions (Section 7.3), prepare a secondary standard to contain
each pollutant at a concentration of 100 mg/L or 500 mg/L for compounds with higher MLs. Where
necessary, a concentration of 1000 mg/L may be used.
7.4.1	Aqueous calibration standardsSUsing a syringe or a microsyringe, add sufficient secondary
standard (Section 7.4) to five reagent water aliquots to produce concentrations in the range
of interest.
7.4.2	Aqueous performance standardSAn aqueous standard containing all pollutants and internal
standard(s) is prepared daily, and analyzed each shift to demonstrate performance (Section
13). This standard shall contain concentrations of pollutants and internal standard(s), as
appropriate, within a factor of 1 to 5 times the MLs of the pollutants listed in Table 1. It
may be one of the aqueous calibration standards described in Section 7.4.1.
8.0	Sample Collection, Preservation, and Handling
8.1	Grab samples are collected in glass containers having a total volume greater than 20 mL. For
aqueous samples that pour freely, fill sample bottles so that no air bubbles pass through the sample
as the bottle is filled and seal each bottle so that no air bubbles are entrapped. Maintain the hermetic
seal on the sample bottle until time of analysis.
8.2	Maintain samples at 4 °C from the time of collection until analysis. Do not freeze. If an aqueous
sample contains residual chlorine, add sodium thiosulfate preservative (10 mg/40 mL) to the empty
sample bottles just prior to shipment to the sample site. EPA Methods 330.4 and 330.5 maybe used
for measurement of residual chlorine (Reference 5). If preservative has been added, shake the bottle
vigorously for 1 minute immediately after filling.

Method 1671, Revision A
8.3	For aqueous samples, experimental evidence indicates that some PMI analytes are susceptible to
rapid biological degradation under certain environmental conditions. Refrigeration alone may not
be adequate to preserve these compounds in wastewaters for more than seven days. For this reason,
a separate sample should be collected, acidified, and analyzed when compounds susceptible to rapid
biological degradation are to be determined. Collect about 500 mL of sample in a clean container.
Adjust the pH of the sample to about 2 by adding hydrochloric acid (1:1) while stirring. Check pH
with narrow range (1.4 to 2.8) pH paper. Fill a sample bottle as described in Section 8.1. If residual
chlorine is present, add sodium thiosulfate to a separate sample bottle and fill as in Section 8.1.
8.4	All samples shall be analyzed within 14 days of collection.
9.0	Quality Assurance/Quality Control
9.1	Each laboratory that uses this method is required to operate a formal quality assurance program
(Reference 6). The minimum requirements of this program consist of an initial demonstration of
laboratory capability (Section 9.5) and analysis of standards (Sections 9.6 and 13) and blanks
(Section 9.4) as tests of continued performance. Each time a batch of samples is analyzed or there
is a change in reagents or procedures, a method blank must be analyzed as a safeguard against
9.2	In recognition of advances that are occurring in analytical technology, and to allow the analyst to
overcome sample matrix interferences, the analyst is permitted certain options to improve
separations or lower the costs of measurements. These options include alternative concentration and
cleanup procedures, and changes in columns and detectors. Alternative techniques, such as the
substitution of spectroscopy or immunoassay, and changes that degrade method performance are not
allowed. If an analytical technique other than the techniques specified in this method is used, that
technique must have a specificity equal to or better than the specificity of the techniques in this
method for the analytes of interest.
9.2.1	If the detection limit of the method will be affected by the change, the laboratory is required
to demonstrate that the method detection limit (MDL; 40 CFR 136, Appendix B) is lower
than one-third the regulatory compliance level. If calibration will be affected by the change,
the analyst must recalibrate the instrument per Section 10.
9.2.2	The laboratory is required to maintain records of modifications made to this method. These
records include the information in this subsection, at a minimum.	The names, titles, addresses, and telephone numbers of the analyst(s) who
performed the analyses and modification, and of the quality control officer
who witnessed and will verify the analyses and modification.	A listing of pollutant(s) measured, by name and CAS Registry Number.

Method 1671, Revision A	A narrative stating the reason(s) for the modification.	Results from all quality control (QC) tests comparing the modified method
to this method including:
(a)	calibration (Section 10);
(b)	calibration verification (Section 13);
(c)	initial precision and accuracy (Section 9.5);
(d)	analysis of blanks (Section 9.4); and
(e)	accuracy assessment (Section 9.6 and 13).	Data that will allow an independent reviewer to validate each determination
by tracing the instrument output (peak height, area, or other signal) to the
final result. These data are to include:
(a)	sample numbers and other identifiers;
(b)	analysis dates and times;
(c)	injection logs;
(d)	analysis sequence/run chronology;
(e)	sample weight or volume;
(f)	sample volume prior to each cleanup step, if applicable;
(g)	sample volume after each cleanup step, if applicable;
(h)	final sample volume prior to injection;
(I)	injection volume;
(j)	dilution data, differentiating between dilution of a sample or an extract;
(k)	instrument and operating conditions;
(1)	column (dimensions, liquid phase, solid support, film thickness, etc.);
(m)	operating conditions (temperature, temperature program, flow rates, etc.);
(n)	detector (type, operating condition, etc.);
(o)	chromatograms, printer tapes, and other recording of raw data; and
(p)	quantitation reports, data system outputs, and other data necessary to link
raw data to the results reported.
9.3	With each sample batch, a matrix spike (MS) and matrix spike duplicate (MSD) are analyzed to
assess precision and accuracy of the analysis. The relative percent difference (RPD) between the
MS and MSD shall be less than 30% and compound recoveries shall fall within the limits specified
in Table 3. If the recovery of any compound falls outside its warning limit, method performance is
unacceptable for that compound in that sample and the results may not be reported for regulatory
compliance purposes.
9.4	Analyses of blanks are required to demonstrate freedom from contamination and thatthe compounds
of interest and interfering compounds have not been carried over from a previous analysis (Section

Method 1671, Revision A
9.4.1 With each sample batch (samples analyzed on the same 12-hour shift), a blank shall be
analyzed immediately after analysis of the aqueous performance standard (Sections 9.6 and
13) to demonstrate freedom from contamination. If any of the compounds of interest or any
potentially interfering compound is found in a blank at greater than the ML (assuming a
response factor of 1 relative to the nearest-eluted internal standard for compounds not listed
in Table 1), analysis of samples is halted until the source of contamination is eliminated and
a blank shows no evidence of contamination at this level.
9.5 Initial precision and recovery—To establish the ability to generate acceptable precision and
accuracy, the analyst shall perform the following operations for compounds to be calibrated.
9.5.1	Analyze two sets of four 5-mL aliquots (eight aliquots total) of the aqueous performance
standard (Section 7.4.2) containing the PMI analytes listed in Table 1.
9.5.2	Using the first set of four analyses, compute the average recovery (X) in percent of spike
level and standard deviation of the recovery (s) in percent of spike level, for each compound.
9.5.3	For each compound, compare s and X with the corresponding limits for initial precision and
accuracy found in Table 3. If s and X for all compounds meet the acceptance criteria,
system performance is acceptable and analysis of blanks and samples may begin. If,
however, any individual s exceeds the precision limit or any individual X falls outside the
range for accuracy, system performance is unacceptable for that compound.
9.5.4	Using the results of the second set of analyses, compute s and X for only those compounds
that failed the test of the first set of four analyses (Section 9.5.3). If these compounds now
pass, the system performance is acceptable for all compounds, and analysis of blanks and
samples may begin. If, however, any of the same compounds fail again, the analysis system
is not performing properly for the compound(s) in question. In this event, correct the
problem and repeat the entire test (Section 9.5).
9.6	The laboratory shall, on an ongoing basis, demonstrate through the analysis of the aqueous
performance standard (Section 7.4.2) that the analysis system is in control. This procedure is
described in Section 13.
9.7	Where available, field replicates may be used to validate the precision of the sampling technique.
9.8	The laboratory shall maintain records to define the quality of data that is generated.
10.0	Calibration
10.1	Inject standards into the GC and adjust the sensitivity to detect an amount of each compound less
than or equal to one-third of the ML listed in Table 2 for the analyte.

Method 1671, Revision A
10.2 Internal standard calibration procedure. The analyst must select one or more internal standards that
are similar in analytical behavior to the compounds of interest. The analyst must further demonstrate
that the measurement of the internal standard(s) is not affected by method or matrix interferences.
Because of these limitations, no internal standard that would be applicable to all samples can be
required in the method. The method was developed using tetrahydrofuran (THF) as an internal
standard. Where THF is not present in the sample matrix and no interference precludes its use, THF
is to be used as an internal standard for application of this method. If interferences preclude use of
THF and other internal standards, external standard calibration may be used.
10.2.1 Prepare aqueous calibration standards at a minimum of five concentration levels for each
analyte by carefully adding an appropriate amount of secondary standard to reagent water
or to the matrix under study. One of the concentrations should be at or below the ML. The
concentration range should bracket the concentrations expected in the samples and should
not exceed the dynamic range of the GC/FID instrument. These aqueous standards must be
prepared daily.
10.2.2 Prepare a spiking solution containing the internal standard(s) using the procedures described
in Sections 7.3 and 7.4 and add an appropriate amount of internal standard to each aqueous
calibration standard.
10.2.3 Using injections appropriate to optimize system sensitivity and separation of the analytes,
analyze each calibration standard and tabulate peak height or area responses against
concentration for each compound and internal standard. Calculate response factors (RF) for
each compound as follows:
As = Response for the analyte to be measured
Ais = Response for the nearest eluting internal standard
Cis = Concentration of the nearest eluting internal standard
Cs = Concentration of the analyte to be measured
If the RF value over the working range is a constant (less than 10% relative standard
deviation), the RF can be assumed to be invariant and the average RF can be used for
calculations. Alternatively, the results can be used to plot a calibration curve of relative
response, AS*C1S/A1S, against analyte concentration (Cs).

Method 1671, Revision A
11.0	Sample Preparation
Samples containing less than 1% solids are analyzed directly as aqueous samples. Samples
containing 1% solids or greater are analyzed after equilibration with reagent water containing
internal standard(s).
11.1	Determination of percent solids.
11.1.1	Weigh 5-10 g of sample into a tared beaker.
11.1.2	Dry overnight (12 hours minimum) at 110±5°C, and cool in a desiccator.
11.1.3	Determine the percent solids as follows:
% solids - we'sh' of sample dry X 100
weight of sample wet
11.2	Remove standards and samples from cold storage and bring to 20-25 °C.
11.3	Samples containing less than 1% solids.
11.3.1	Allow solids to settle and remove 5 mL of sample.
11.3.2	Add an appropriate amount of internal standard spiking solution.
11.3.3	Inject a sample directly into the GC. The temperature of the injection block should be great
enough to immediately vaporize the entire sample. An example of the separations achieved
by the column listed is shown in Figure 1.
Note: Use of a ().2-j^iL injection has been found to improve method sensitivity over a larger injection
combined with a split sample. Where possible, splitless injection should be used. All requirements
of this Method must be met regardless of type of injection used.
11.4 Samples containing 1% solids or greater.
11.4.1 Mix the sample thoroughly using a clean spatula and remove rocks, twigs, sticks, and other
foreign matter.

Method 1671, Revision A
11.4.2	Add 5±1 g of sample to a tared 10-mL centrifuge tube. Using a clean metal spatula, break
up any lumps of sample. Record the sample weight to three significant figures.
11.4.3	Add an appropriate amount of internal standard spiking solution to the sample in the
centrifuge tube.
11.4.4	Add a measured quantity (Y ± 0.1 mL) of reagent water to the tube so as to minimize head
11.4.5	Place a cap on the centrifuge tube leaving little or no headspace. Place the tube in the
sonicator for a minimum of 5 minutes, turning occasionally. For most samples this should
be sufficient time to distribute the analytes and standard(s) between the solid and aqueous
phases and to establish equilibrium. Some sample matrices may require more sonication.
11.4.6	On completion of sonication, centrifuge the sample and inject the same amount of supernate
into the GC that was injected for the calibration standards.
11.5 For liquid samples containing high-solids concentrations, such as sludges or muds, weigh
approximately 5 g (to three significant figures) into a 10-mL centrifuge tube, add an appropriate
amount of internal standard solution, sonicate, centrifuge, and inject as in Section 11.4.6.
12.1 The calibration curve or averaged response factor determined during calibration is used to calculate
the concentration. For calculation using the averaged RF, the equation below is used, and the terms
are as defined in Section 10.2.3.
12.2 The concentration of the pollutant in the solid phase of the sample is computed using the
concentration of the pollutant detected in the aqueous solution, as follows:
12.0 Quantitative Determination
Concentration in solid (mg/kg)
YL x aqueous cone (mg/L)
sample wt (kg)
x percent solids x DF
percent solids is from Section 11.1
Y = Volume of water in liters (L) from 11.4.4
DF = Dilution factor (as a decimal number), if necessary

Method 1671, Revision A
12.3	Sample dilution—If the calibration range of the system is exceeded, the sample is diluted by
successive factors of 10 until the sample concentration is within the calibration range.
12.4	Report results for all pollutants found in standards, blanks, and samples to three significant figures.
For samples containing less than 1 % solids, the units are milligrams per liter (mg/L); and for samples
containing 1% solids or greater, units are milligrams per kilogram (mg/kg).
13.0	System Performance
13.1	At the beginning of each 12-hour shift during which analyses are performed, system calibration and
performance shall be verified. Acceptance criteria for each compound (R) are found in Table 3.
Adjustment and/or recalibration shall be performed until all performance criteria are met. Only after
all performance criteria are met may blanks and samples be analyzed.
13.2	Where THF is used as the internal standard, the absolute retention time of THF shall be 416 seconds
(±30 seconds). The relative retention times of all pollutants shall fall within 10% of the value given
in Table 2.
14.0	Method Performance
14.1	This method was developed and validated in a single laboratory.
14.2	A chromatogram of the aqueous performance standard is shown in Figure 1.
15.0	Pollution Prevention
15.1	Pollution prevention encompasses any technique that reduces or eliminates the quantity or toxicity
of waste at the point of generation. Many opportunities for pollution prevention exist in laboratory
operation. EPA has established a preferred hierarchy of environmental management techniques that
places pollution prevention as the management option of first choice. Whenever feasible, laboratory
personnel should use pollution prevention techniques to address their waste generation. When
wastes cannot be reduced feasibly at the source, the Agency recommends recycling as the next best
option. The acids used in this Method should be reused as practicable by purifying by
electrochemical techniques. The only other chemicals used in this Method are the neat materials
used in preparing standards. These standards are used in extremely small amounts and pose little
threat to the environment when managed properly. Standards should be prepared in volumes
consistent with laboratory use to minimize the disposal of excess volumes of expired standards.
15.2	For information about pollution prevention that may be applied to laboratories and research
institutions, consult Less is Better: Laboratory Chemical Management for Waste Reduction,
available from the American Chemical Society's Department of Governmental Relations and Science
Policy, 1155 16th Street NW, Washington DC 20036, 202/872-4477.

Method 1671, Revision A
16.0	Waste Management
16.1	It is the laboratory's responsibility to comply with all Federal, State, and local regulations governing
waste management, particularly the hazardous waste identification rules and land-disposal
restrictions. In addition, it is the laboratory's responsibility to protect air, water, and land resources
by minimizing and controlling all releases from fume hoods and bench operations. Also, compliance
is required with any sewage discharge permits and regulations.
16.2	Samples containing acids at a pH of less than 2 are hazardous and must be neutralized before being
poured down a drain or must be handled as hazardous waste.
16.3	For further information on waste management, consult The Waste Management Manual for
Laboratory Personnel and Less is Better: Laboratory Chemical Managementfor Waste Reduction,
both available from the American Chemical Society's Department of Government Relations and
Science Policy, 1155 16th Street NW, Washington, DC 20036.

Method 1671, Revision A
17.0 References
1.	"Standard Test Method for Volatile Alcohols in Water by Direct Aqueous-Injection Gas
Chromatography." 1994 Annual Book of ASTM Standards, Volume 11.02 (Water (II)). ASTM,
1916 Race Street, Philadelphia, PA 19103-1187.
2.	"Working with Carcinogens," DHEW, PHS, NIOSH, Publication 77-206 (1977).
3.	"OSHA Safety and Health Standards, General Industry," 29 CFR 1910, OSHA 2206 (1976).
4.	"Safety in Academic Chemistry Laboratories," American Chemical Society Publication, Committee
on Chemical Safety (1979).
5.	"Methods 330.4 and 330.5 for Total Residual Chlorine," USEPA, EMSL Cincinnati, OH 45268.
6.	"Method of Analytical Quality Control in Water and Wastewater Laboratories," USEPA, EMSL
Cincinnati, OH 45268, EPA-4-79-019 (March, 1979).
7.	Technical Report to PhRMA from Tichler & Kocurek by Malcolm Pirnie Laboratory, EPA Water
Docket for Pharmaceutical Manufacturing Industry rule proposed May 2, 1995 (60 FR 21592),
Document Control Number 8166 at Record Section 13.2.4. (February 13, 1997).

Method 1671, Revision A
18.0 Tables
Table 1. Non-purgeable Water Soluble PMI Analytesto be Analyzed by DirectAqueous Injection
GC/FID and Internal Standard Techniques
PMI Analyte
Dimethyl sulfoxide
Ethylene glycol
Methyl Cellosolve® (2-methoxyethanol)
1 Chemical Abstracts Service Registry Number

Method 1671, Revision A
Table 2. Gas Chromatographic Retention Times and Minimum Levels for Non-purgeable Water
Soluble PMI Analytes by Direct Aqueous Injection GC/FID
Retention Time	ML1
PMI Analyte
Mean (sec)
Tetrahydrofuran (int std)

Methyl Cellosolve®
Ethylene glycol
Dimethyl sulfoxide
1	This is a minimum level at which the entire analytical system shall give an acceptable calibration
point, taking into account method-specific sample and injection volumes. The concentration in the aqueous
or solid phase is determined using the equations in Section 12.
2	The minimum level for this analyte was developed from data provided in Reference 7.

Method 1671, Revision A
Table 3. Acceptance Criteria for Performance Tests
Acceptance Criteria (% of Spike Level)
Initial Precision and
PMI Analyte
70 - 146
70 - 148
65 - 130
70 - 130
70- 153
70 - 155
Dimethyl sulfoxide
31 - 130
30 - 130
70- 131
70 - 132
Ethylene glycol
70 - 149
70 - 150
70- 130
70 - 130
70- 130
70 - 130
70- 130
70 - 130
Methyl Cellosolve®
64- 130
64 - 130
70- 137
70 - 139
70 - 165
68 - 168

Method 1671, Revision A
Analysis ; 4 MPL3,8,1
Crealed at 1036cn Oi/Dgcj&4
Sample#: a
hjee ion # : 1
Sample Name: MDL#3

10 11
Fgure 1. Chromatogram of Aqueous Pertor ma nee
Standard of Anatytes from Table 1