1.1 本试验方法涵盖芳烃、其衍生物和相关化学品中有机氯化物的测定。 1.2 本试验方法适用于氯化物浓度为25 mg/kg的样品。检测限（LOD）为0.2 mg/kg，定量限（LOQ）为0.7 mg/kg。通过仔细的分析技术或重复测量，或两者兼有，该方法可用于成功分析LOD以下的浓度。 注1: 最大值是实验室间研究的最高浓度，LOD和LOQ是根据性能测试程序（PTP）数据计算的。见表1。 1.3 此测试方法优于测试方法 D5194 用于通过联苯钠试剂聚合的产品，如苯乙烯。 1.4 在使用该方法确定测试结果是否符合适用规范时，应根据实践中的舍入方法对结果进行舍入 E29 。 1.5 由于燃烧过程中无机物质的部分回收，含有无机氯化物的样品的有机氯化物值将偏高。在分析之前，可以通过水洗样品来减少来自无机物种的干扰。这不适用于水溶性样品。 1.6 以国际单位制表示的数值应视为标准。本标准中不包括其他计量单位。 1.7 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 有关具体危险说明，请参阅 7.3 和Section 9 。 1.8 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ===意义和用途====== 5.1 有机和无机氯化合物可能对涉及碳氢化合物的过程中的设备和反应有害。 5.2 工艺流和碳氢化合物产品通常规定最高氯化物含量。 5.3 有机氯化物可能会对炼油过程造成损害。盐酸可以在加氢处理或重整反应器中生产，这种酸会在炼油厂的冷凝区积累。

1.1 This test method covers the determination of organic chloride in aromatic hydrocarbons, their derivatives, and related chemicals. 1.2 This test method is applicable to samples with chloride concentrations to 25 mg/kg. The limit of detection (LOD) is 0.2 mg/kg and the limit of quantitation (LOQ) is 0.7 mg/kg. With careful analytical technique or the measurement of replicates, or both, this method can be used to successfully analyze concentrations below the LOD. Note 1: The maximum is the highest concentration from the interlaboratory study and the LOD and LOQ were calculated from Performance Testing Program (PTP) data. See Table 1. 1.3 This test method is preferred over Test Method D5194 for products, such as styrene, that are polymerized by the sodium biphenyl reagent. 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 Organic chloride values of samples containing inorganic chlorides will be biased high due to partial recovery of inorganic species during combustion. Interference from inorganic species can be reduced by water washing the sample before analysis. This does not apply to water soluble samples. 1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.7 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. For specific hazard statements, see 7.3 and Section 9 . 1.8 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. ====== Significance And Use ====== 5.1 Organic as well as inorganic chlorine compounds can prove harmful to equipment and reactions in processes involving hydrocarbons. 5.2 Maximum chloride levels are often specified for process streams and for hydrocarbon products. 5.3 Organic chloride species are potentially damaging to refinery processes. Hydrochloric acid can be produced in hydrotreating or reforming reactors and this acid accumulates in condensing regions of the refinery.