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Determination of Taurine in Lycium Barbarum L. and Other Foods by Capillary Electrophoresis with Electrochemical Detection
Author(s) -
Cao Yuhua,
Zhang Xin,
Chu Qingcui,
Fang Yuzhi,
Ye Jiang
Publication year - 2003
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200390112
Subject(s) - capillary electrophoresis , detection limit , taurine , lycium , chemistry , chromatography , electrode , working electrode , electrochemistry , capillary action , electrophoresis , analytical chemistry (journal) , buffer solution , materials science , biochemistry , medicine , alternative medicine , amino acid , pathology , composite material
A method based on capillary electrophoresis (CE) with electrochemical detection (ED) was developed for the determination of taurine in Lycium Barbarum L. , LIPOVIYAN beverage and milk powder. The effects of some important factors such as the acidity of the running buffer, separation voltage, injection time, and applied potential to working electrode were investigated. Operated in a wall‐jet configuration, a 300 μ m diameter carbon‐disk electrode was used as the working electrode, which exhibits good responses at +1.05 V (vs. SCE) for taurine. Excellent linearity was obtained in the concentration range from 5.0×10 −4 mol/L to 5.0×10 −6 mol/L. The detection limit (S/N=3) was 1.0×10 −7 mol/L. This proposed method has been successfully applied to analyze the actual samples with satisfactory assay results.