EXTRACTION OF CHROMIUM COMPLEX WITH ALIZARIN RED-S BY ALIQUAT-336 IN CHLOROFORM

被引：0
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作者：
PRZESZLAKOWSKI, S
TYRALA, M
机构：
来源：
CHEMIA ANALITYCZNA | 1990年 / 35卷 / 06期
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中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Reaction of chromium with Alizarin Red S at various temperatures (from 22-degrees-C to 84-degrees-C) was investigated spectrophotometrically in pH range between 3.0 and and 6.7. Only chromium(III) forms in aqueous solutions with ARS coloured complexes of type 1:1 and 1:2 whereas bichromate ions are first reduced by the reagent to chromium(III). Only the complex anion Me(HL)2- is extracted into Aliquat 336 in chloroform. Absorption maximum for the complex in organic phase was found at 535 nm (epsilon = 2.21 x 10(4)). Beer's law is obeyed in the concentration range of chromium between 0.1 ad 2.5 ppm.
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页码：709 / 716
页数：8
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