水质 总有机碳(TOC)和溶解性有机碳(DOC)测定指南

[中文适用范围]： 本标准为饮用水、地下水、地表水、海水和废水中总碳（TC）、总无机碳（TIC）和总有机碳（TOC）的测定提供了指导。 它还定义了术语并指定了水样的干扰物、试剂和样品预处理。 本国际标准中描述的方法适用于有机碳含量范围为 0.3 mg/l 至 1000 mg/l 的水样。 下限浓度仅适用于特殊情况，例如饮用水，由高灵敏度仪器测量。 适当稀释后可测定更高的浓度。 本国际标准不涉及与仪器相关的规范。 可净化的有机物质，例如苯、甲苯、环己烷和氯仿，也可以使用该方法测定。 当样品中存在氰化物、氰酸盐和元素碳颗粒（烟灰）时，可以与有机碳一起测定。 [外文原描述]： This International Standard gives guidance for the determination of total carbon (TC), total inorganic carbon (TIC) and total organic carbon (TOC) in drinking water, ground water, surface water, sea water and waste water. It also defines terms and specifies interferences, reagents, and sample pretreatment for water samples. The method described in this International Standard applies to water samples containing organic carbon content ranging from 0,3 mg/l to 1000 mg/l. The lower limit concentration is only applicable in special cases, for example drinking water, measured by highly sensitive instruments. Higher concentrations may be determined after appropriate dilution. This International Standard does not deal with the instrument-dependent specifications. Purgeable organic substances, such as benzene, toluene, cyclohexane and chloroform, can also be determined using this method. Cyanide, cyanate and particles of elemental carbon (soot), when present in the sample, can be determined together with the organic carbon.