SENSITIVE FLOTATION-SPECTROPHOTOMETRIC METHOD FOR THE DETERMINATION OF VANADIUM(IV) WITH 3,5-DINITROSALICYLIC ACID AND RHODAMINE-B

被引：4

作者：

MATHEW, L ^{[1
]}

REDDY, MLP ^{[1
]}

RAO, TP ^{[1
]}

IYER, CSP ^{[1
]}

DAMODARAN, AD ^{[1
]}

机构：

[1] CSIR,REG RES LAB,TRIVANDRUM 695019,KERALA,INDIA

来源：

FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY | 1994年 / 350卷 / 03期

关键词：

D O I：

10.1007/BF00323184

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Vanadium(IV) is determined by reaction with 3,5-dinitrosalicylic acid and rhodamine B in weakly acidic medium. The flotation of the ternary ion-association complex is carried out with cyclohexane followed by dissolution in acetone for subsequent spectrophotometric determination. The molar absorptivity is 5.91 x10(5)l mole(-1) cm(-1) at 555nm. Beer's law is obeyed in the range 0.05 - 1.5 mu g vanadium(IV) in 25 ml. The method is selective for vanadium(IV) in the presence of sodium fluoride and has been applied to standard reference materials.

引用

页码：180 / 181

页数：2

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