EFFECT OF MODEL ORGANIC-COMPOUNDS ON POTENTIOMETRIC STRIPPING ANALYSIS USING A CELLULOSE-ACETATE MEMBRANE-COVERED ELECTRODE

被引：33
作者：
ALDSTADT, JH [1 ]
DEWALD, HD [1 ]
机构：
[1] OHIO UNIV,CLIPPINGER LABS,DEPT CHEM,ATHENS,OH 45701
来源：
ANALYTICAL CHEMISTRY | 1993年 / 65卷 / 07期
关键词：
D O I：
10.1021/ac00055a015
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The effects of model surfactants (sodium dodecyl sulfate, Triton X-100), proteins (ovalbumin, gelatin), and carbohydrates (agar, starch) as well as D-camphor and humic acid on a cellulose acetate dialysis membrane-modified mercury film electrode (CM-MFE) in potentiometric stripping analysis (PSA) are described. The CM-MFE (1000 amu molecular weight cutoff) minimized interference by these compounds to the PSA measurement. The constant current stripping analysis (CCSA) mode was found to provide a more stable response than the use of Hg(II) as chemical oxidant with the CM-MFE. Results presented for urine and natural water samples demonstrate the analytical utility of the CM-MFE in PSA.
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页码：922 / 926
页数：5
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