1.1 这些试验方法涵盖了水中氰化物的测定。包括以下试验方法: 小节 试验方法A 蒸馏后总氰化物 12 – 18 试验方法B 易氯化的氰化物 2. 按差异 19 – 25 试验方法C 弱酸可离解氰化物 26 – 32 试验方法D 易氯化的氰化物 蒸馏（捷径法） 33 – 39 1.2 卤化氰可单独测定。 注1: 氯化氰是最常见的卤化氰络合物，因为它是一种反应产物，通常在对含氰化物的工业废水进行氯化时存在。 对于是否存在CNCl，请使用中给出的现场测试方法 附件A1 可以使用。 1.3 这些测试方法不区分氰化物离子和金属氰化物化合物和络合物。此外，他们没有检测到氰酸盐。氰酸盐可使用离子色谱法测定，无需消化。 注2: 当样品在蒸馏过程中酸化时，氰酸盐络合物分解。 1.4 这些试验方法不能完全回收金、铂、钴和其他一些过渡金属的氰络合物中的氰化物。参考测试方法 D6994 用于氰金属络合物的测定。 1.5 仅从少数有机氰化物中回收氰化物，而这些氰化物的回收程度很小。 1.6 这些测试方法的一部分或全部已成功用于试剂水和各种废水。用户有责任确保测试水基质的测试方法的有效性。 1.7 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。 1.8 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 5.1 , 8.8 , 8.18 部分 9 , 11.3 和 16.1.9 . 1.9 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 氰化物有毒。已制定法规，要求对工业和生活废物以及地表水中的氰化物进行监测( 附录X1 ). 5.2 试验方法D适用于天然水和清洁金属表面处理或热处理废水。如果其适用性已通过试验方法B或C验证，则其可用于废水处理设施的过程控制。 5.3 中概述的现场测试 附件A1 可用于检测水或废水中的氰化物和硫氰酸盐，并近似其浓度。

1.1 These test methods cover the determination of cyanides in water. The following test methods are included: Sections Test Method A Total Cyanides after Distillation 12 – 18 Test Method B Cyanides Amenable to Chlorination 2 by Difference 19 – 25 Test Method C Weak Acid Dissociable Cyanides 26 – 32 Test Method D Cyanides Amenable to Chlorination without Distillation (Short-Cut Method) 33 – 39 1.2 Cyanogen halides may be determined separately. Note 1: Cyanogen chloride is the most common of the cyanogen halide complexes as it is a reaction product and is usually present when chlorinating cyanide-containing industrial waste water. For the presence or absence of CNCl, the spot test method given in Annex A1 can be used. 1.3 These test methods do not distinguish between cyanide ions and metallocyanide compounds and complexes. Furthermore, they do not detect the cyanates. Cyanates can be determined using ion chromatography without digestion. Note 2: The cyanate complexes are decomposed when the sample is acidified in the distillation procedure. 1.4 The cyanide in cyanocomplexes of gold, platinum, cobalt and some other transition metals is not completely recovered by these test methods. Refer to Test Method D6994 for the determination of cyanometal complexes. 1.5 Cyanide from only a few organic cyanides are recovered, and those only to a minor extent. 1.6 Part or all of these test methods have been used successfully with reagent water and various waste waters. It is the user's responsibility to assure the validity of the test method for the water matrix being tested. 1.7 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.8 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 5.1 , 8.8 , 8.18 , Section 9 , 11.3 , and 16.1.9 . 1.9 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 Cyanide is highly toxic. Regulations have been established to require the monitoring of cyanide in industrial and domestic wastes and in surface waters ( Appendix X1 ). 5.2 Test Method D is applicable for natural water and clean metal finishing or heat treatment effluents. It may be used for process control in wastewater treatment facilities providing its applicability has been validated by Test Method B or C. 5.3 The spot test outlined in Annex A1 can be used to detect cyanide and thiocyanate in water or wastewater, and to approximate its concentration.