ASTM D1688-2007 水中铜的标准试验方法

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                   【英文标准名称】:     Standard Test Methods for Copper in Water            【原文标准名称】:     水中铜的标准试验方法            【标准号】:     ASTM D1688-2007            【标准状态】:     现行            【国别】:                 【发布日期】:     2007    【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】: D19.05【标准类型】: (Test Method)【标准水平】: ()【中文主题词】: 铜;测试;水【英文主题词】: atomic absorption;  chelation;  copper;  flame;  graphite furnace; water【摘要】: Copper is found in naturally occurring minerals principally as a sulfide, oxide, or carbonate. It makes up approximately 0.01 % of the earthrsquo;crust and is obtained commercially from such ores as chalcopyrite (CuFeS2). Copper is also found in biological complexes such as hemocyanin. Copper enters water supplies through the natural process of dissolution of minerals, through industrial effluents, through its use, as copper sulfate, to control biological growth in some reservoirs and distribution systems, and through corrosion of copper alloy water pipes. Industries whose wastewaters may contain significant concentrations of copper include mining, ammunition production, and most metal plating and finishing operations. It may occur in simple ionic form or in one of many complexes with such groups as cyanide, chloride, ammonia, or organic ligands. Although its salts, particularly copper sulfate, inhibit biological growth such as some algae and bacteria, copper is considered essential to human nutrition and is not considered a toxic chemical at concentrations normally found in water supplies.1.1 These test methods cover the determination of copper in water by atomic absorption spectrophotometry. Three test methods are included as follows:Test MethodConcentration Range Sections A-Atomic Absorption, Direct0.05 to 5 mg/LB-Atomic Absorption, Chelation-Extraction50 to 500 g/LC-Atomic Absorption, Graphite Furnace5 to 100 g/L         
         

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