水质.亚甲基蓝活性物质(MBAS)指数的测定.连续流分析(CFA)方法

[中文适用范围]： 本国际标准规定了一种测定各种水样（例如地下水、饮用水、地表水、废水和渗滤液）中亚甲基蓝活性物质（MBAS）指数的程序，范围分别为 0.05 mg/l 至 0.5 mg/l 和 0.5 mg/l 至 5.0 mg/l。阴离子表面活性剂是显示亚甲基蓝活性的最重要物质。因此，该方法可用于估算水中的阴离子表面活性剂含量（包括带有羧基的阴离子表面活性剂，例如肥皂）。其他类型的物质也可能显示亚甲基蓝活性并贡献于结果。在个案基础上，分析范围可以改变，并且该方法可用于其他浓度范围，前提是它们覆盖恰好一个数量级的浓度单位。 [外文原描述]： ISO 16265:2009 specifies a procedure for the determination of the methylene blue active substances (MBAS) index, in the ranges 0,05 mg/l to 0,5 mg/l and 0,5 mg/l to 5,0 mg/l, in various water samples (e.g. ground water, drinking water, surface water, waste water and leachates). Anionic surfactants are the most important substances showing methylene blue activity. This method is therefore useful for estimating the anionic surfactant content [including anionic surfactants with carboxylate groups (e.g. soaps)] of water. Other types of substance may also show methylene blue activity and contribute to the result. On a case-by-case basis, the range of the analysis may be changed and the method used for other concentration ranges provided they cover exactly one decade of concentration units.