DETERMINATION OF NANOMOLAR LEVELS OF GUANINE BY DIFFERENTIAL-PULSE ADSORPTIVE CATHODIC STRIPPING VOLTAMMETRY OF ITS COPPER(II) COMPLEX

被引：9
|
作者：
SHUBIETAH, RM [1 ]
ABUZUHRI, AZ [1 ]
FOGG, AG [1 ]
机构：
[1] LOUGHBOROUGH UNIV TECHNOL,DEPT CHEM,LOUGHBOROUGH LE11 3TU,LEICS,ENGLAND
来源：
FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY | 1994年 / 348卷 / 11期
关键词：
D O I：
10.1007/BF00323699
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Guanine is determined at the 5.0 X 10(-10) -2.0 X 10(-7) mol/l level by differential-pulse adsorptive stripping voltammetry at a hanging mercury drop electrode using the reduction peak of its copper (II) complex at -0.21 V vs. Ag-AgCl electrode. The optimum analytical conditions were found to be Britton-Robinson buffer solution (pH 4.8), an accumulation potential of 0.0 V and an accumulation time of 3 min. Under these conditions, the detection limit is 5.0 X 10(-10) mol/l and the relative standard deviation 2.6% for 1.0 X 10(-7) mol/l guanine. The method is compared with the previous voltammetric methods. The presence of some purine derivatives does not interfere.
引用
收藏
页码：754 / 757
页数：4
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