Chelatometric dispersive liquid-liquid microextraction followed by capillary electrophoresis for the analysis of total and water soluble copper in Rhizoma coptidis

被引：9
|
作者：
Meng, Fan-Yun [1 ,3 ]
Wei, Ying-Qin [1 ,2 ,3 ]
Lu, Heng [1 ,3 ]
Zhou, Xiao-Teng [1 ,3 ]
Liu, Jin-Xin [1 ,3 ]
Li, Geng [1 ,3 ]
Hou, Jing-Yi [1 ,3 ]
机构：
[1] Beijing Normal Univ, Beijing Key Lab Protect & Utilizat Chinese Med, Beijing 100875, Peoples R China
[2] Shandong Inst Light Ind, Sch Chem Engn, Jinan 250353, Peoples R China
[3] Beijing Normal Univ, Inst Nat Med & Chinese Med Resources, Beijing 100875, Peoples R China
来源：
CHINESE CHEMICAL LETTERS | 2013年 / 24卷 / 06期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Capillary electrophoresis; cDLLME; Speciation; Rhizoma coptidis; ATOMIC-ABSORPTION-SPECTROMETRY; CLOUD POINT EXTRACTION; SOLID-PHASE EXTRACTION; SAMPLES; PRECONCENTRATION; LEAD; MERCURY; IONS;
D O I：
10.1016/j.cclet.2013.03.042
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A new method for the analysis of copper and its speciation in Rhizoma coptidis was proposed using chelatometric dispersive liquid-liquid microextraction (cDLLME) followed by capillary electrophoresis. Dithizone was used as a chelating agent for extraction and carbon tetrachloride and ethanol were used as extraction and dispersive solvent, respectively. The calibration curve was linear in the range of 0.5-20.0 mu g/mL with a correlation coefficient of 0.9990 (n = 6) and the average recovery was in the range of 88.26%-94.44%. The method was successfully used to determine the total and water soluble copper in Rhizoma coptidis herbal medicine. The results suggested that it would be reasonable to setting the criterion of heavy metals in an herbal medicine according to the dosage forms. (C) 2013 Ying-Qin Wei. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
引用
收藏
页码：506 / 508
页数：3
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