FLOW-INJECTION EXTRACTION SPECTROPHOTOMETRIC DETERMINATION OF CHROMIUM(VI) WITH THE BENZYLTRIBUTYLAMMONIUM CATION

被引：8

作者：

BARAKAT, SA ^{[1
]}

BURNS, DT ^{[1
]}

HARRIOTT, M ^{[1
]}

机构：

[1] QUEENS UNIV BELFAST,DEPT ANALYT CHEM,BELFAST BT9 5AG,ANTRIM,NORTH IRELAND

来源：

ANALYTICA CHIMICA ACTA | 1993年 / 272卷 / 01期

关键词：

FLOW INJECTION; SPECTROPHOTOMETRY; BENZYLTRIBUTYLAMMONIUM DICHROMATE EXTRACTION; CHROMIUM;

D O I：

10.1016/0003-2670(93)80384-W

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Chromium(VI) can be determined spectrophotometrically at 365 nm after flow-injection extraction into chloroform of the ion associate benzyltributylammonium dichromate. The carrier stream was distilled water, merged with 1.0 M sulphuric acid solution, the reagent stream was 0.5% (w/v) benzyltributylammonium chloride solution. The injection rate was 20 h-1. The calibration graph was linear up to 20 mug ml-1 and the detection limit (3 X baseline noise) was 0.5 mug ml-1 Cr(VI) based on 250-mul injection volumes. The system has been applied to the determination of chromium in steels.

引用

页码：135 / 138

页数：4

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