Determination of diethylene glycol in toothpaste by capillary electrophoresis with electrochemical detection

被引：0
作者：
Xiaoping Xing
Xue Shi
Haitao Zhang
Weiyu Wang
Jiannong Ye
机构：
[1] East China Normal University,Department of Chemistry
[2] Yancheng Institute of Technology,Department of Science and Industry
来源：
Microchimica Acta | 2009年 / 167卷
关键词：
Capillary electrophoresis; Electrochemical detection; Diethylene glycol; Toothpaste;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Diethylene glycol (DEG) can be determined in toothpaste via capillary electrophoresis at 16 kV using a fused silica capillary of 75 cm length and of 25 μm diameter along with a copper disc electrode detector operated at  + 0.65 V (vs. SCE). DEG, propylene glyco1 and glycerol in a running buffer of pH 9.2 were separated within 17 min. The linear range for DEG is from 840 to to 4.2 μg·mL−1, and the detection limit (at S/N = 3) is 1.6 μg·mL−1 which therefore meets the safety limit. When applied to the analysis of DEG in toothpaste, the recoveries are between 96.9 and 103.0% for spiked samples and thus are quite satisfactory.
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页码：297 / 302
页数：5
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