1.1 本试验方法使用高效液相色谱法（HPLC）测定0.1 μg/g（ppm）至600μ。可通过用甲醇稀释来分析氯生产设施中含有非常高浓度三氯化氮的溶剂样品。 1.2 查看当前的安全数据表（SDS），了解有关毒性、急救程序和安全预防措施的详细信息。 1.3 以国际单位制表示的数值应视为标准。本标准不包括其他计量单位。 1.4 以下内容适用于确定使用该测试方法的测试结果是否符合适用规范的目的，应根据四舍五入对结果进行四舍五舍五入- 偏离练习方法 E29 . 1.5 本标准并不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。 具体危害说明见第节 8. . 1.6 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====== 4.1 本试验方法用于测定四氯化碳液体样品中的三氯化氮，该样品取自氯生产厂的压缩机吸入式冷却器底部和工厂中可能收集并浓缩三氯化氮至可能爆炸的水平的其他地方。 然后对试验方法进行了修改，以测量在产品液氯中观察到的较低水平的三氯化氮。该试验方法足够灵敏，可以测量正常生产液氯过程中观察到的三氯化氮含量。 4.2 这种三氯化氮的测试方法需要对高浓度的过程中样品进行稀释（100:1），使其处于分析的工作范围内。

1.1 This test method uses high performance liquid chromatography (HPLC) to determine nitrogen trichloride levels in liquid chlorine at the 0.1 μg/g (ppm) to 600 μg/g (ppm) range. Solvent samples from chlorine production facilities containing very high concentrations of nitrogen trichloride may be analyzed by dilution with methanol. 1.2 Review the current safety data sheet (SDS) for detailed information concerning toxicity, first aid procedures, and safety precautions. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 The following applies for the purposes of determining the conformance of the test results using this test method to applicable specifications, results shall be rounded off in accordance with the rounding-off method of Practice E29 . 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. Specific hazard statements are given in Section 8 . 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. ====== Significance And Use ====== 4.1 This test method was developed for the determination of nitrogen trichloride in samples of carbon tetrachloride liquid taken from the compressor suction chiller bottoms of chlorine production plants and other places in the plants that may collect and concentrate nitrogen trichloride to levels that could explode. The test method was then modified to measure the lower levels of nitrogen trichloride observed in product liquid chlorine. This test method is sensitive enough to measure the levels of nitrogen trichloride observed in the normal production of liquid chlorine. 4.2 This test method for nitrogen trichloride will require the dilution (100:1) of highly concentrated in-process samples to bring them within the working range of the analysis.