ASTM D6133-02
(Test Method)Standard Test Method for Acetone, p-Chlorobenzotrifluoride, Methyl Acetate or t-Butyl Acetate Content of Solventborne and Waterborne Paints, Coatings, Resins, and Raw Materials by Direct Injection Into a Gas Chromatograph
Standard Test Method for Acetone, <i>p</i>-Chlorobenzotrifluoride, Methyl Acetate or <i>t</i>-Butyl Acetate Content of Solventborne and Waterborne Paints, Coatings, Resins, and Raw Materials by Direct Injection Into a Gas Chromatograph
SIGNIFICANCE AND USE
With the need to calculate volatile organic content (VOC) of paints, and with acetone, p-chlorobenzotrifluoride, methyl acetate and t-butyl acetate4 considered as exempt volatile compounds, it is necessary to know the content of these analytes. This gas chromatographic test method provides a relatively simple and direct way to determine their content. However, because the detectors used in this test method are not selective, and because some coatings are very complex mixtures, compounds may be present in the sample that coelute with the analyte, giving a result that is erroneously high. Or a component may elute with the internal standard, giving a result that is erroneously low. It is therefore important to know the composition of the sample to ensure that there are no interferences, under the analysis conditions used. Test Method D 6438 employs mass-spectral detection of analytes and may be used as an alternative method.
SCOPE
1.1 This test method is for the determination of the total-concentration of acetone, p-chlorobenzotrifluoride, methyl acetate, or t-butyl acetate, or combination of any of the four, in solvent-reducible and water-reducible paints, coatings, resins, and raw materials. Because unknown compounds that co-elute with the analyte being measured or with the internal standard, will lead to erroneous results, this test method should only be used for materials of known composition so that the possibility of interferences can be eliminated. The established working range of this test method is from 1 % to 100 % for each analyte by weight.
1.2 The values stated in SI units are to be regarded as the standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: D 6133 – 02
Standard Test Method for
Acetone, p-Chlorobenzotrifluoride, Methyl Acetate or t-Butyl
Acetate Content of Solventborne and Waterborne Paints,
Coatings, Resins, and Raw Materials by Direct Injection Into
1
a Gas Chromatograph
This standard is issued under the fixed designation D 6133; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Summary of Test Method
1.1 This test method is for the determination of the total- 3.1 A suitable aliquot of whole paint is internally standard-
concentration of acetone, p-chlorobenzotrifluoride, methyl ac- ized, diluted with an appropriate solvent, and then injected into
etate, or t-butyl acetate, or combination of any of the four, in a gas chromatographic column that separates the chosen
solvent-reducible and water-reducible paints, coatings, resins, analytesfromothervolatilecomponents.Theanalytecontentis
and raw materials. Because unknown compounds that co-elute determined from area calculations of the materials producing
with the analyte being measured or with the internal standard, peaks on the chromatogram.
will lead to erroneous results, this test method should only be
4. Significance and Use
used for materials of known composition so that the possibility
of interferences can be eliminated. The established working 4.1 With the need to calculate volatile organic content
(VOC) of paints, and with acetone, p-chlorobenzotrifluoride,
range of this test method is from 1 % to 100 % for each analyte
4
by weight. methyl acetate and t-butyl acetate considered as exempt
volatile compounds, it is necessary to know the content of
1.2 The values stated in SI units are to be regarded as the
standard. these analytes. This gas chromatographic test method provides
a relatively simple and direct way to determine their content.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the However, because the detectors used in this test method are not
selective, and because some coatings are very complex mix-
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- tures, compounds may be present in the sample that coelute
with the analyte, giving a result that is erroneously high. Or a
bility of regulatory limitations prior to use.
component may elute with the internal standard, giving a result
2. Referenced Documents
that is erroneously low. It is therefore important to know the
2.1 ASTM Standards: composition of the sample to ensure that there are no interfer-
D 3271 Practice for Direct Injection of Solvent-Reducible ences, under the analysis conditions used. Test Method D 6438
2
Paints into a Gas Chromatograph for Solvent Analysis employs mass-spectral detection of analytes and may be used
D 3272 Practice for Vacuum Distillation of Solvents from as an alternative method.
2
Solvent-Reducible Paints for Analysis
5. Apparatus
D 6438 Test Method for Acetone, Methyl Acetate, and
Parachlorobenzotrifluoride Content of Paints and Coatings 5.1 Gas Chromatograph—Anyinstrumentwithtemperature
2
programming capability may be used. It should be equipped
by Solid Phase Microextraction-Gas Chromatography
E 177 Practice for Use of the Terms Precision and Bias in with a flame ionization detector (see Table 1).
3
5.2 Column—Any column that provides baseline separation
ASTM Test Methods
E 691 Practice for Conducting an Interlaboratory Study to of the analyte of interest (acetone, p-chlorobenzotrifluoride,
3
methylacetateor t-butylacetate),theinternalstandard,andany
Determine the Precision of a Test Method
volatile present in the samples may be used. It should be
understood that column performance may be influenced by
1
manufacturing conditions, such as type of deactivation and
This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
D01.21 on Chemical Analysis of Paints and Paint Materials.
Current edition approved Dec. 10, 2002. Published February 2003. Originally
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approved in 1997. Last previous edition approved in 2000 as D 6133 – 00. At the time of the revision of this test method, t-butyl acetate was not yet
2
Annual Book of ASTM Standards, Vol 06.01. approved as an exempt solvent, but was under review by the USEPA and was
3
Annual Book of ASTM Standards, Vol 14.02. expected to be approved. Therefore, it has been included in this test method.
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