| 摘要: |
| 概述了目前可行的一些分析表面活性剂产品中残留的氯乙酸盐的分析方法，总结了各个方法的优缺点。同时对行业标准QB/ T 2950-2008《醇（酚）醚羧酸（盐）》中规定的氯乙酸乙酯化方法的细节进行了深入研究。研究结果表明，将溶解标样的溶剂由水改为乙醇后，极大改善了标准曲线的线性；通过对蒸馏过程的进一步细化，提高了方法的精密度；采用气相色谱无分流进样技术，以氢火焰代替质谱检测器进行研究取得了良好的效果。 |
| 关键词: 醇醚羧酸盐 氯乙酸（盐） 气相色谱 分析方法 |
| DOI：10.13222/j.cnki.dc.2016.06.004 |
| 分类号:TQ423.11 |
| 基金项目: |
|
| Research on the improvement of QB/T 2950-2008: determination of monochloroaceticacid (salt) in AEC surfactant products |
|
HAN Jian-ying1, FENG Yu2
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|
1.Shanghai Fine Chemical Co., Ltd.;2.China Research Institute of Daily Chemical Industry
|
| Abstract: |
| Several analytical methods currently applicable for the determination of chloroacetate residual in the products of alkyl
ethoxylated carboxylates (AEC) surfactants were reviewed, as well as the advantages and disadvantages of each method. The analytical
procedure by esterification of chloroacetic acid in China Industrial Standard QB/T 2950-2008 was studied in detail. The experimental
results showed that replacement of water by ethanol as the solvent of standard sample would significantly increase the linearity of
standard curve; the precision of method could be enhanced by further improvement of the distillation process; and the mass detector
used in the method might be substituted by high quality flame ionization detector combined with splitless injection. |
| Key words: alkyl ethoxylated carboxylates (AEC) chloroacetic acid (salt) gas chromatography analytical method |
