ELECTROCHEMICAL-BEHAVIOR OF GUANINE AND ITS DETERMINATION BY DIFFERENTIAL-PULSE ADSORPTION STRIPPING VOLTAMMETRY

被引：7
|
作者：
SUN, XX [1 ]
CHI, YM [1 ]
CHEN, HY [1 ]
机构：
[1] NANJING UNIV,DEPT CHEM,NANJING 210008,PEOPLES R CHINA
来源：
MICROCHEMICAL JOURNAL | 1993年 / 47卷 / 03期
关键词：
D O I：
10.1006/mchj.1993.1045
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A sensitive method for the determination of nanomolar concentrations of guanine in a medium of 0.02 M NaHCO3-0.06 M Na2SO4 by differential pulse adsorption cathodic stripping voltammetry has been developed. The limit of detection is 3 × 10-10M guanine. In the presence of 10-fold guanosine (at a concentration of 2 × 10-7M) ca. 2 × 10-9M guanine can be detected. By means of cyclic voltammetry and other electrochemical methods, a new viewpoint on the mechanism of the overall electrode process for guanine at a hanging mercury drop electrode in the potential range of -1.0 to +0.2 V (vs SCE), including two separate steps, has been proposed. © 1993 Academic Press. All rights reserved.
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页码：287 / 295
页数：9
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