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ASTM D7284-2008 利用气体扩散分离和安培检测法对微蒸馏后水样中总氰化物的流量注入分析(FIA)的标准试验方法

ASTM D7284-2008 利用气体扩散分离和安培检测法对微蒸馏后水样中总氰化物的流量注入分析(FIA)的标准试验方法

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【英文标准名称】: Standard Test Method for Total Cyanide in Water by Micro Distillation followed by Flow Injection Analysis with Gas Diffusion Separation and Amperometric Detection
【原文标准名称】: 利用气体扩散分离和安培检测法对微蒸馏后水样中总氰化物的流量注入分析(FIA)的标准试验方法
【标准号】: ASTM D7284-2008
【标准状态】: 现行
【国别】: 美国
【发布日期】: 2008
【实施或试行日期】:
【发布单位】: 美国材料与试验协会(US-ASTM)
【起草单位】: D19.06
【标准类型】: (Test Method)
【标准水平】: ()
【中文主题词】:
【英文主题词】: amperometry; cyanide; distillation; flow injection analysis; gas diffusion membrane; total cyanide
【摘要】: 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. This test method is applicable for natural waters, industrial wastewaters and effluents.1.1 This test method is used to determine the concentration of total cyanide in an aqueous wastewater or effluent. The 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 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 400 x03BC;g/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 method utilizes flow injection with amperometric detection based on Test Method D 6888. 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 D 2036. 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 Note 2 and Section 9.
【中国标准分类号】: Z16
【国际标准分类号】: 13_060_50
【页数】: 6P.;A4
【正文语种】: 英语

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