1.1 本试验方法涵盖了水中氯化氰的测定。氯化氰通常仅在非常低的浓度下存在；它是一种非常不稳定且稀溶的气体化合物。含氰化物或硫氰酸盐化合物的废水氯化后，水样可能含有氯化氰。 1.2 氯化氰不稳定。在采集样品后立即使用斑点板或比较器进行快速测试可能是最佳测试，可以减少采样和分析之间的时间间隔内氯化氰的损失。（参见 图1 对于溶液中氯化氰的典型衰减曲线。 ) 图1 氯化氰稳定性 1.3 该测试方法已成功用于试剂水。分析员负责确定测试方法是否适用于被测试的水基质。参考试验方法中的试验方法D D2036 它基于类似的化学反应，并通过该矩阵中的协作测试进行了评估。 1.4 可检测性下限为0.005 mg CN − /L。 1.5 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。 1.6 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、健康和环境实践，并确定监管限制的适用性。 具体危险说明见 8.5 和 8.7 和截面 9 . 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 氯化卫生和工业废水中存在氯化氰，因此受纳水体受到关注，因为其对水生生物具有毒性。 5.2 本试验方法提供了测量水中氯化氰的分析程序。 5.3 本试验方法适用于清洁的金属表面处理和氯化的卫生和工业废水，也可用于建立废水处理设施中通过氯化破坏氰化物的过程控制。

1.1 This test method covers the determination of cyanogen chloride in water. Cyanogen chloride is normally present only at very low concentrations; it is a very labile and sparsely soluble gaseous compound. Water samples may contain cyanogen chloride after the chlorination of waste waters containing cyanide or thiocyanate compounds. 1.2 Cyanogen chloride is unstable. A quick test using a spot plate or comparator as soon as the sample is collected may be the best test, reducing the loss of cyanogen chloride during the time lapse between sampling and analysis. (See Fig. 1 for a typical decay curve for cyanogen chloride in a solution.) FIG. 1 Cyanogen Chloride Stability 1.3 This test method has been used successfully with reagent water. The analyst is responsible for determining whether the test method is applicable to the water matrix being tested. Reference is made to Test Method D of Test Methods D2036 which is based on similar chemical reactions and has been evaluated by collaborative testing in this matrix. 1.4 The lower limit of detectability is 0.005 mg CN − /L. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific hazard statements are given in 8.5 and 8.7 and Section 9 . 1.7 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 The presence of cyanogen chloride in chlorinated sanitary and industrial effluents and therefore receiving waters is of concern because of its toxicity to aquatic life. 5.2 This test method provides an analytical procedure for measuring cyanogen chloride in water. 5.3 This test method is applicable for clean metal finishing and chlorinated sanitary and industrial effluents, and also can be used to establish process control of cyanide destruction by chlorination in waste water treatment facilities.