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1.1 These test methods cover the determination of ethylbenzene and total eight-carbon (C
1.2 It is recognized by analytical chemists that a single column gas chromatography analysis of an unknown sample is risky. In such cases, multiple and different analytical techniques must be used for absolutely positive identification, for example, several different gas chromatography columns, gas chromatography/mass spectrometer, or gas chromatography/infrared, etc. In these test methods the material is known and is clearly defined.
1.3 Oxygenated compounds, if present, may interfere and cause erroneous results. Such oxygenated compounds are not normally present in mineral spirits.
1.4 Three test methods are covered as follows:
1.4.1 Test Method A measurement of ethylbenzene content, C
1.4.2 Test Method B measurement of ethylbenzene content by means of a rapid packed column gas chromatographic analysis.
1.4.3 Test Method C measurement of ethylbenzene content, C
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.6 For purposes of determining conformance of an observed or a calculated value using this test method to relevant specifications, test result(s) shall be rounded off "to the nearest unit" in the last right-hand digit used in expressing the specification limit, in accordance with the rounding-off method of Practice E 29.
1.7 For hazard information and guidance, see the supplier''s Material Safety Data Sheet.
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.
|Engelse titel||Standard Test Methods for Aromatics in Mineral Spirits by Gas Chromatography|