Determination of Cystine by Second Order Differential Simple Oscillographic Voltammetry

Authors

Fu-Fang TAO, Institute of Electroanalytical Chemistry, Northwest University, Xian 710069, China
Jian-Bin ZHENG, Institute of Electroanalytical Chemistry, Northwest University, Xian 710069, China);Follow

Corresponding Author

Jian-bin ZHENG(zhengjb@nwu.edu.cn)

Abstract

In 0.2 mol/L NaOH, cystine can cause an sensitive incision at -0.5 V (vs.SCE) of cathodic branch of dE/dt-E curve or second order differential simple oscillogram. Based on the oscillographic charateristic, second order differential simple oscillographic voltammetry was applied to the determination of cystine in tablet. The linear range and the detection limit for determination of cystine were 2.5×10^-6～3.5×10^-5 mol/L and 1.0×10^-6 mol/L, respectively. The relative standard deviation for 2.000×10^-5 mol/L cystine was 1.8% (n=5).

Keywords

Oscillographic analysis, Second order differential simple oscillo graphic voltammetry, Cystine

DOI Link

https://doi.org/10.61558/2993-074X.1535

Publication Date

2003-11-28

Online Available Date

2003-11-28

Revised Date

2003-05-04

Received Date

2002-10-12

Recommended Citation

Fu-Fang TAO, Jian-Bin ZHENG. Determination of Cystine by Second Order Differential Simple Oscillographic Voltammetry[J]. Journal of Electrochemistry, 2003 , 9(4): 471-474.
DOI: 10.61558/2993-074X.1535
Available at: https://jelectrochem.xmu.edu.cn/journal/vol9/iss4/15