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
收藏
页码：135 / 138
页数：4
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