表面活性剂. 表面活性剂中氯乙酸 (氯醋酸盐) 残留量的测定. 第1部分: HPLC法

[中文适用范围]： ISO 17293的本部分规定了采用HPLC法测定表面活性剂中一氯乙酸（monochloroacetate）和二氯乙酸（dichloroacetate）的方法。 该方法适用于阴离子表面活性剂，例如烷基（苯基）乙氧基化羧酸盐（AEC）或两性表面活性剂，例如烷基咪唑啉羧酸盐、烷基二甲基甜菜碱和脂肪乙酰基丙基二甲基甜菜碱。 一氯乙酸的检测限 (LOD) ≤0.3 µg/ml，二氯乙酸的检测限 (LOD) ≤0.2 µg/ml；一氯乙酸的定量限 (LOQ) ≤1.0 µg/ml，二氯乙酸的定量限 (LOQ) ≤0.75 µg/ml（使用标准溶液）。 在 5 g 样品重量下，一氯乙酸的 LOD ≤ 6 mg/kg，二氯乙酸的 LOD ≤ 4 mg/kg；一氯乙酸的 LOQ ≤20 mg/kg，二氯乙酸的 LOQ ≤15 mg/kg。 [外文原描述]： ISO 17283-1:2014 specifies a method for the determination of monochloroacetic acid (monochloroacetate) and dichloroacetic acid (dichloroacetate) in surfactants by HPLC method. The method applies for anionic surfactants such as alkyl (phenyl) ethoxylated carboxylate (AEC) or amphoteric surfactants such as alkyl imidazoline carboxylate, alkyl dimethyl betaine, and fatty acetyl propyl dimethyl betaine. The limit of detection (LOD) is ≤0,3 µg/ml for monochloroacetic acid and ≤0,2 µg/ml for dichloroacetic acid; the limit of quantification (LOQ) is ≤1,0 µg/ml for monochloroacetic acid and ≤0,75 µg/ml for dichloroacetic acid (using a standard solution). The LOD, at 5 g of sample weight, is ≤6 mg/kg for monochloroacetic acid and ≤4 mg/kg for dichloroacetic acid; and the LOQ is ≤20 mg/kg for monochloroacetic acid and ≤15 mg/kg for dichloroacetic acid.