水质.可吸附卤素(AOX)的测定

[中文适用范围]： 本国际标准规定了直接测定水中可吸附在活性炭上的有机结合氯、溴和碘（以氯化物表示）的量（通常为10μg/l）的方法。 本方法适用于无机氯离子浓度小于1 g/l的测试样品（见9.2）。 浓度较高的样品在分析前进行稀释。 该方法也适用于含有悬浮固体的样品，其中卤素吸附在固体物质上（例如不溶性卤化物）。 分析前过滤样品可以单独测定溶解的和颗粒状可吸附有机结合卤素 (AOX)。 具有高无机氯化物含量的过滤样品可以通过改进的方法进行分析[在高盐含量的水中进行固相萃取（SPE-AOX）后溶解可吸附的有机结合卤素]（参见附录A）。 然而，通过这种修改方法获得的结果可能与所需方法的结果有很大不同。 [外文原描述]： ISO 9562:2004 specifies a method for the direct determination of an amount of usually 10 micrograms per litre in water of organically bound chlorine, bromine and iodine (expressed as chloride) adsorbable on activated carbon. This method is applicable to test samples with concentrations of inorganic chloride ions of less than 1 g/l. Samples with higher concentrations are diluted prior to analysis. This method is also applicable to samples containing suspended solids where halogens are adsorbed onto the solid matter (e.g. insoluble halides). Filtration of the sample before analysis allows the separate determination of dissolved and particulate adsorbable organically bound halogens (AOX). Filtered samples with high inorganic chloride content can be analysed by a modified method [dissolved adsorbable organically bound halogens after solid phase extraction in waters with high salt content (SPE-AOX)]. However, results obtained by this modified method can differ significantly from those of the required method.