Surface active agents - Determination of chloroacetic acid (chloroacetate) in surfactants - Part 1: HPLC method
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 โค0,3 ยตg/ml for monochloroacetic acid and โค0,2 ยตg/ml for dichloroacetic acid; the limit of quantification (LOQ) is โค1,0 ยตg/ml for monochloroacetic acid and โค0,75 ยตg/ml for dichloroacetic acid (using a standard solution).
The LOD, at 5 g of sample weight, is โค6 mg/kg for monochloroacetic acid and โค4 mg/kg for dichloroacetic acid; and the LOQ is โค20 mg/kg for monochloroacetic acid and โค15 mg/kg for dichloroacetic acid.
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