1.1 本试验方法用于测定含水废水或流出物中总氰化物的浓度。本试验方法检测游离氰化物（HCN和CN – )强金属氰化物络合物，在强酸性条件下回流时解离并释放游离氰化物。 1.2 本试验方法可能不适用于贵金属采矿作业的工艺溶液。 1.3 该程序适用于总氰化物约为2至500μg/L（十亿分之一）的范围。可以通过样品稀释或较低的注射量来测量较高的浓度。 1.4 该测试方法的确定步骤利用基于测试方法的电流检测流动注射 D6888 . 分析前，必须使用本试验方法中所述的微蒸馏装置或试验方法中规定的适当氰化物蒸馏装置对样品进行蒸馏 D2036 . 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 8.6 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 氰化物和氰化氢有毒。已制定法规，要求监测工业和生活废物及地表水中的氰化物。 3. 5.2 本试验方法适用于天然水、工业废水和废水。

1.1 This test method is used to determine the concentration of total cyanide in an aqueous wastewater or effluent. This test method detects the cyanides that are free (HCN and CN – ) and strong-metal-cyanide complexes that dissociate and release free cyanide when refluxed under strongly acidic conditions. 1.2 This test method may not be applicable to process solutions from precious metals mining operations. 1.3 This procedure is applicable over a range of approximately 2 to 500 μg/L (parts per billion) total cyanide. Higher concentrations can be measured with sample dilution or lower injection volume. 1.4 The determinative step of this test method utilizes flow injection with amperometric detection based on Test Method D6888 . Prior to analysis, samples must be distilled with a micro-distillation apparatus described in this test method or with a suitable cyanide distillation apparatus specified in Test Methods D2036 . 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 8.6 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 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 waters, industrial wastewaters and effluents.