GAS PERMEATION AND PRECONCENTRATION IN THE FLOW-INJECTION DETERMINATION OF ACID-AVAILABLE CYANIDE IN WASTE-WATER

被引：29

作者：

KUBAN, V ^{[1
]}

机构：

[1] MASARYK UNIV, DEPT ANALYT CHEM, CS-61137 BRNO, CZECHOSLOVAKIA

来源：

ANALYTICA CHIMICA ACTA | 1992年 / 259卷 / 01期

关键词：

FLOW SYSTEM; SPECTROPHOTOMETRY; CYANIDE; GAS PERMEATION; MEMBRANE SEPARATION; PRECONCENTRATION; WATERS;

D O I：

10.1016/0003-2670(92)85073-F

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The determination of cyanide based on the reaction with highly selective sodium isonicotinate-3-methyl-1-phenyl-2-pyrazolin-5-one was optimized and compared with other spectrophotometric methods based on Konig's reaction. A reaction mechanism is proposed. The method, based on the formation of an intermediate product, allows a fast and highly sensitive determination of cyanide ions at concentrations from units to hundreds of mu-g l-1. The sampling frequency is 20 h-1 and the detection limit is 3-mu-g l-1 when 2.0 ml of sample are used. Most interferences, including those of CNS-, are eliminated by discrimination of mass transport through a non-porous silicone-rubber membrane.

引用

页码：45 / 52

页数：8

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