ASTM-D7504 2010

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D7504-10 Standard Test Method for Trace Impurities in Monocyclic Aromatic Hydrocarbons by Gas Chromatography and Effective Carbon Number

Published By	Publication Date	Number of Pages
ASTM	2010	12

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Categories: 71.080.15 - Aromatic hydrocarbons, ASTM

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Description

1.1 This test method covers the determination of the total nonaromatic hydrocarbons and trace monocyclic aromatic hydrocarbons in toluene, mixed xylenes, p -xylene, o -xylene, ethylbenzene, and benzene by gas chromatography. The purity of toluene, mixed xylenes, p -xylene, o -xylene, ethylbenzene, or benzene can also be calculated. Similar test methods, using the internal standard calibration technique and the external standard calibration technique, are Test Methods D2360 , D3797 , D4492 , D5060 , D5917 , and D6563 respectively.

1.2 Total aliphatic hydrocarbons containing 1 through 10 carbon atoms (methane through decanes) can be detected by this test method at concentrations ranging from 0.0001 to 2.5000 weight %.

1.2.1 A small amount of benzene in mixed xylenes or p -xylene may not be distinguished from the non-aromatics and the concentrations are determined as a composite (see 6.1).

1.3 Monocyclic aromatic hydrocarbon impurities containing 6 through 10 carbon atoms (benzene through C ₁₀ aromatics) can be detected by this test method at individual concentrations ranging from 0.0001 to 2.5000 weight %.

1.4 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded off in accordance with the rounding-off method of Practice E29 .

1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.6 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.

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents
2	Terminology Summary of Test Method Significance and Use Interferences Apparatus Reagents and Materials TABLE 1
3	Hazards Sampling Preparation of Apparatus Calibration Procedure Calculation or Interpretation of Results Report Precision and Bias TABLE 2
4	Quality Guidelines FIG. 1
5	Keywords FIG. 2
6	FIG. 3
7	FIG. 4
8	FIG. 5 FIG. 6
9	FIG. 7 TABLE 3 TABLE 4
10	TABLE 5 TABLE 6 TABLE 7 TABLE 8
11	TABLE 9 TABLE 10 TABLE 11 TABLE 12
12	TABLE 13

Additional information

Standard Title	D7504-10 Standard Test Method for Trace Impurities in Monocyclic Aromatic Hydrocarbons by Gas Chromatography and Effective Carbon Number
Published Code	ASTM
Publication Date	2010
Pages Count	12
ICS Codes	71.080.15 - Aromatic hydrocarbons

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ASTM-D7504 2010

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