Electrochemiluminescent determination of L-cysteine with a flow-injection analysis system

被引：15
|
作者：
Zhu, L [1 ]
Li, YX [1 ]
Zhu, GY [1 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Peoples R China
来源：
ANALYTICAL SCIENCES | 2003年 / 19卷 / 04期
关键词：
D O I：
10.2116/analsci.19.575
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A flow-injection electrochemiluminescent method for L-cysteine determination has been developed based on its enhancement of the electrochemiluminecence of luminol at a glassy carbon electrode. This method is simple and sensitive for cysteine determination. Under the selected experimental parameters, the linear range for cysteine concentration was 1.0 x 10(-6) - 5.0 x 10(-5) mol/l, and the detection limit was 0.67 mumol/l (SIN = 3). The relative standard deviation for 11 measurements of 1.0 x 10(-5) mol/l cysteine was 4.5%. The proposed method has been applied to. the detection of cysteine in pharmaceutical injections with satisfactory results.
引用
收藏
页码：575 / 578
页数：4
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