GAS-DIFFUSION DILUTION FLOW-INJECTION METHOD FOR THE DETERMINATION OF ETHANOL IN BEVERAGES WITHOUT SAMPLE PRETREATMENT

被引：47

作者：

KUNNECKE, W

SCHMID, RD

机构：

[1] GBF - Gesellschaft für Biotechnologische Forschung, Department of Enzyme Technology, D-3300 Braunschweig

来源：

ANALYTICA CHIMICA ACTA | 1990年 / 234卷 / 01期

关键词：

D O I：

10.1016/S0003-2670(00)83559-X

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The combination of immobilized alcohol oxidase (AOD) with a gas-diffusion membrane in a flow-injection system greatly enhanced the specificity of ethanol determination. This gas-diffusion flow-injection system with amperometric detection of hydrogen peroxide had a linear range of analysis from 0.0006 up to 60% (v/v) ethanol. Silicone-modified polypropylene membranes of different thickness were used. Undiluted samples of beer, wine, spirits and medicine could be investigated with excellent correlation with standard methods (r > 0.997). The frequency of analysis was 120-180 samples h-1 and the operational half-life of the immobilized enzyme was 8000 injections within 44 h. © 1990.

引用

页码：213 / 220

页数：8

共 31 条

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