Selenium speciation in tea by dispersive liquid-liquid microextraction coupled to high-performance liquid chromatography after derivatization with 2,3-diaminonaphthalene

被引：21

作者：

Zhou, Qingxiang ^{[1
]}

Lei, Man ^{[1
]}

Li, Jing ^{[1
]}

Wang, Mengyun ^{[1
]}

Zhao, Danchen ^{[1
]}

Xing, An ^{[1
]}

Zhao, Kuifu ^{[1
]}

机构：

[1] China Univ Petr, Coll Geosci, Beijing Key Lab Oil & Gas Pollut Control, Beijing 102249, Peoples R China

来源：

JOURNAL OF SEPARATION SCIENCE | 2015年 / 38卷 / 09期

基金：

中国国家自然科学基金;

关键词：

2,3-Diaminonaphthalene; Dispersive liquid-liquid microextraction; Selenium; Tea; PLASMA-MASS SPECTROMETRY; ULTRA-TRACE AMOUNTS; INORGANIC SELENIUM; ENVIRONMENTAL WATER; ORGANIC-COMPOUNDS; AMINO-ACIDS; ICP-MS; SAMPLES; PRECONCENTRATION; INFUSION;

D O I：

10.1002/jssc.201401373

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Selenium is an important element for human health, and it is present in many natural drinks and foods. Present study described a new method using dispersive liquid-liquid microextraction prior to high-performance liquid chromatography with a UV variable wavelength detector for the determination of the total selenium, Se(IV), Se(VI), and total organoselenium in tea samples. In the procedure, 2,3-diaminonaphthalene was used as the chelating reagent, 400 mu L acetonitrile was used as the disperser solvent and 60 mu L chlorobenzene was used as the extraction solvent. The complex of Se(IV) and 2,3-diaminonaphthalene in the final extracted phase was analyzed by high-performance liquid chromatography. The factors influencing the derivatization and microextraction were investigated. Under the optimal conditions, the limit of detection was 0.11 mu g/L for Se(IV) and the linearity range was in the range of 0.5-40 mu g/L. This method was successfully applied to the determination of selenium in four tea samples with spiked recoveries ranging from 91.3 to 100%.

引用

页码：1577 / 1583

页数：7

共 42 条

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