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用气相色谱分析法和有效碳数测定单环烃中痕量杂质的试验方法

标准编号: ASTM D7504-2018
标准名称: 用气相色谱分析法和有效碳数测定单环烃中痕量杂质的试验方法
英文名称: Standard Test Method for Trace Impurities in Monocyclic Aromatic Hydrocarbons by Gas Chromatography and Effective Carbon Number
实施时间:
范围: 1.1 This test method covers the determination of total nonaromatic hydrocarbons and monocyclic aromatic hydrocarbons in benzene, toluene, ethylbenzene, p-xylene, o-xylene, styrene and mixed xylenes by gas chromatography. The purity of benzene, toluene, ethylbenzene, p-xylene, o-xylene, styrene and mixed xylenes is also calculated. Similar test methods, using the internal standard calibration technique and the external standard calibration technique, are Test Methods D2360, D3797, D4492, D5060, D5135, D5917, and D6563 respectively. 1.2 The limit of detection (LOD) is 0.0002 wt % and limit of quantitation (LOQ) is 0.0006 wt % for impurities in toluene, mixed xylenes, p-xylene, o-xylene, ethylbenzene, benzene, and styrene. 1.3 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. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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关联标准

引用标准

  • ASTM E260;ASTM E355;ASTM E691;ASTM D5211;ASTM D5917;ASTM D6229;ASTM D6563;ASTM D5135;ASTM D5136;ASTM D1555M;ASTM D2360;ASTM D3437;ASTM D3797;ASTM D4492;ASTM D841;ASTM D4790;ASTM D5060;ASTM E1510;ASTM D6809;ASTM E29;ASTM E177

替代标准

  • ASTM D7504-2017a

被替代标准

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