1.1 本试验方法使用高效液相色谱法（HPLC）测定0.1至600μg/g（ppm）范围内液氯中的三氯化氮含量。来自含氯生产设施的溶剂样品含有非常高浓度的三氯化氮，可以用甲醇稀释进行分析。 1.2 有关毒性、急救程序和安全预防措施的详细信息，请查看当前的安全数据表（SDS）。 1.3 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 第节给出了具体的危险说明 8. . ====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，四氯化碳液体样品取自氯气生产厂的压缩机吸入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水平的其他地方。然后对试验方法进行修改，以测量产品液氯中观察到的较低水平的三氯化氮。本试验方法足够灵敏，可测量正常生产液氯过程中观察到的三氯化氮水平。 4.2 本三氯化氮试验方法需要稀释（100:1）高浓度的过程中样品，使其在分析的工作范围内。

1.1 This test method uses high performance liquid chromatography (HPLC) to determine nitrogen trichloride levels in liquid chlorine at the 0.1 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 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. Specific hazard statements are given in Section 8 . ====== 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.