1.1 该方法用于测定含水废水或流出物中可用无机氰化物的浓度。该方法检测游离氰化物（HCN和CN - )金属氰化物络合物很容易分解成游离氰化物离子。该方法不检测毒性较低的强金属氰化物络合物，即“不易氯化”的氰化物 1.2 对于按照试验方法中所述蒸馏的样品，可以测定总氰化物 D2036 ，试验方法A，蒸馏后的总氰化物。氰化物络合物被解离并吸收到氢氧化钠捕获溶液中，该溶液可以用本试验方法进行分析；因此，配位体交换来自切片的试剂 8.12 和 8.13 蒸馏后测定总氰化物时不需要。 1.3 该程序适用于大约2至400μg/L（十亿分之一）的可用氰化物范围。 可以通过稀释或较低的注射量来分析较高的浓度。 1.4 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。 1.5 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。 具体危险说明见 8.6 和截面 9 . ====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、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的过程控制。

1.1 This 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 Sections 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 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 and health practices and determine the applicability of regulatory limitations prior to use. Specific hazard statements are given in 8.6 and Section 9 . ====== 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.