Surface active agents — Determination of chloroacetic acid (chloroacetate) in surfactants — Part 2: Ionic chromatographic method
表面活性剂——表面活性剂中氯乙酸(氯乙酸)的测定第2部分:离子色谱法
发布日期:
2014-03-19
ISO 17293-2:2014规定了用离子色谱法测定表面活性剂中一氯乙酸(一氯乙酸)和二氯乙酸(二氯乙酸)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丙基二甲基甜菜碱。
检测限(LOD)为≤0.01μg/ml(一氯乙酸)和≤二氯乙酸为0.05μg/ml;定量限(LOQ)为≤每种标准品0.1μg/ml(使用标准溶液)。
样品重量为1g时的LOD为≤1毫克/千克氯乙酸和≤二氯乙酸为5mg/kg;LOQ是≤每种酸10毫克/千克。
ISO 17293-2:2014 specifies a method for the determination of monochloroacetic acid (monochloroacetate) and dichloroacetic acid (dichloroacetate) in surfactants by ion chromatographic 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 ≤0,01 μg/ml for monochloroacetic acid and ≤0,05 μg/ml for dichloroacetic acid; and the limit of quantification (LOQ) is ≤0,1 μg/ml for each standard (using a standard solution).
The LOD, at 1 g of sample weight, is ≤1 mg/kg for monochloroacetic acid and ≤5 mg/kg for dichloroacetic acid; and the LOQ is ≤10 mg/kg for each acid.