离子色谱法测定表面活性剂中的一氯乙酸和二氯乙酸  

Determination of monochloroacetic acid and dichloroacetic acid in surfactants by ion chromatography

作　　者：崔世勇[1] 姜丽华[1] 

机构地区：[1]上海市宝山区疾病预防控制中心,上海201901

出　　处：《中国卫生检验杂志》2013年第18期3486-3488,共3页Chinese Journal of Health Laboratory Technology

摘　　要：目的建立表面活性剂中一氯乙酸和二氯乙酸的离子色谱检测法。方法利用Metrohm882离子色谱仪，选用MetrosepASupp5阴离子色谱分析柱，进样体积20μl，3．2mmol／LNa2C03和1．0mmol／LNaHCO，混合溶液做流动相，流速0．7ml／min，电导检测器，0．45μm滤膜过滤后直接进样。结果本法相关性r〉0．999，一氯乙酸和二氯乙酸的最低检出限分别为0．002mg／L和0．005mg／L，相对标准偏差在1．12％～3．35％，回收率在92．4％～103．5％。结论本法具有简便快速，灵敏准确及安全实用的特点，适合表面活性剂中一氯乙酸和二氯乙酸的检测。Objective To establish a method for the simultaneous determination of MCAA and DCAA in suffactants by ion chro- matography. Methods The ion chromatograph ＇Metrohm 882 and the anion exchange column Metrosep A Supp 5 were used for the separation of MCAA and DCAA. A mixed solution composed of 3.2 mmol/L sodium carbonate and 1.0 mmol/L sodium bi- carbonate was used as mobile phase at flow rate of 0.7 ml/min. Direct injection happened after filtration through 0.45 μm filter membrane by the electric conductivity detector. Results The correlation coefficients of the method were over 0.999. The de- tection limits of MCAA and DCAA were identified as 0.002 mg/L and 0. 005 mg/L respectively. The relative standard devia- tions were between 1.12% and 3.35%. The recovery rates were between 92.4% and 103.5%. Conclusion This method is simple, rapid, sensitive, accurate, safe and practical for determination of MCAA and DCAA in surfactants.

关 键 词：离子色谱法 表面活性剂 一氯乙酸 二氯乙酸 

分 类 号：O657.75[理学—分析化学]