1.1 本试验方法用于测定废水或废水中有效无机氰化物的浓度。该方法检测游离的氰化物（HCN和CN - )以及容易离解成游离氰化物离子的金属氰化物络合物。该方法无法检测毒性较小的强金属氰化物络合物，即不“易氯化”的氰化物 1.2 可以按照试验方法中的描述，对已蒸馏的样品测定总氰化物 D2036 ，试验方法A，蒸馏后的总氰化物。氰化物络合物离解并被吸收到氢氧化钠捕获溶液中，可以用这种测试方法进行分析； 因此，配体交换试剂来自 8.12 和 8.13 在蒸馏后测定总氰化物时将不需要。 1.3 此程序适用于大约2 μg/L至400 μg/L（十亿分之一）的可用氰化物。较高的浓度可以通过稀释或较低的注射体积进行分析。 1.4 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。 1.5 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 8.6 和Section 9 。 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====== 5.1 氰化物和氰化氢具有剧毒。已制定法规，要求监测工业和生活废物以及地表水中的氰化物。 3. 5.2 本试验方法适用于天然水、盐水、冶金工艺溶液和废水。 5.3 该方法可用于废水处理设施中的过程控制。

1.1 This test method is used to determine the concentration of available inorganic cyanide in an aqueous wastewater or effluent. The method detects the cyanides that are free (HCN and CN - ) and metal-cyanide complexes that are easily dissociated into free cyanide ions. The method does not detect the less toxic strong metal-cyanide complexes, cyanides that are not “amenable to chlorination.” 1.2 Total cyanide can be determined for samples that have been distilled as described in Test Methods D2036 , Test Method A, Total Cyanides after Distillation. The cyanide complexes are dissociated and absorbed into the sodium hydroxide capture solution, which can be analyzed with this test method; therefore, ligand exchange reagents from 8.12 and 8.13 would not be required when determining total cyanide after distillation. 1.3 This procedure is applicable over a range of approximately 2 μg/L to 400 μg/L (parts per billion) available cyanides. Higher concentrations can be analyzed by dilution or lower injection volume. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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 8.6 and Section 9 . 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 ====== 5.1 Cyanide and hydrogen cyanide are highly toxic. Regulations have been established to require the monitoring of cyanide in industrial and domestic wastes and surface waters. 3 5.2 This test method is applicable for natural water, saline waters, metallurgical process solutions, and wastewater effluent. 5.3 The method may be used for process control in wastewater treatment facilities.