水质 可吸附有机结合氟、氯、溴和碘（AOF、AOCl、AOBr、AOI）的测定 燃烧法和后续离子色谱法测定

[中文适用范围]： 本文件规定了测定吸附性有机结合卤素（氟、氯、溴和碘）的方法。吸附作用发生在填充的活性炭柱上。该方法适用于测定：≥ 2 µg/l AOF（以 F 计）；≥ 10 µg/l AOCl（以 Cl 计）；≥ 1 µg/l AOBr（以 Br 计）；≥ 1 µg/l AOI（以 I 计）。该方法适用于测定水（例如地下水、地表水、河岸渗滤液、饮用水、水浸出液、冷却水和废水）中吸附性有机结合氟、氯、溴和碘。工作范围受活性炭容量、过程空白和色谱分离柱容量的限制。可能需要将样品稀释到工作范围内。通过使用低空白活性炭，应用范围可扩展至更低的浓度。该方法也可适用于含有悬浮固体的样品。吸附在悬浮固体上的卤素（例如未溶解的卤化物）也被测定。使用 0.45 µm 膜滤器对样品进行过滤，可分别测定溶解的吸附性有机结合卤素和颗粒结合部分。结果在国际实验室间比对中提出（见附录 K）。 [外文原描述]： This document specifies a method for the determination of organically bound halogens fluorine, chlorine, bromine and iodine which are adsorbable on activated carbon. Adsorption takes place on activated carbon packed in columns. The method is applicable for the determination of: ≥ 2 µg/l AOF, expressed as F; ≥ 10 µg/l AOCl, expressed as Cl; ≥ 1 µg/l AOBr, expressed as Br; ≥ 1 µg/l AOI, expressed as I. The method is applicable for the determination of adsorbable organically bound fluorine, chlorine, bromine and iodine in water, e.g. in groundwater, surface water, bank filtrate, drinking water, aqueous eluates, cooling water and wastewater. The working range is limited by the capacity of the activated carbon, the process blank and the capacity of the chromatographic separation column. Sample dilution into the working range can be required. The range of application can be extended to lower concentrations with lower process blanks e.g. using low blank activated carbons. The method can also be applied for samples containing suspended solids. Halogens adsorbed on the suspended solids (e.g. undissolved halides) are also determined. Filtration of the sample prior to analysis using a membrane filter (0,45 µm) allows the separate determination of dissolved adsorbable and particulate bound fractions of organically bound fluorine, chlorine, bromine or iodine. Results from an international interlaboratory trial are presented in Annex K.