SOLOCHROME YELLOW 2GS AS ORGANIC REAGENT FOR SPECTROMETRIC DETERMINATION OF IRON(III)

被引：0
|
作者：
Vladescu, Luminita [1 ]
Radu, Cristian F. [1 ]
机构：
[1] Univ Bucharest, Dept Analyt Chem, Bucharest 030018, Romania
来源：
REVUE ROUMAINE DE CHIMIE | 2009年 / 54卷 / 01期
关键词：
iron(III); Solochrome Yellow 2GS; UV-VIS spectrometry; SOLID-PHASE EXTRACTION; SPECTROPHOTOMETRIC DETERMINATION; COMPLEXATION EQUILIBRIA; STABILITY-CONSTANTS; ACID;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A rapid, reliable and inexpensive method for the direct determination of Fe (111) with the organic reagent Solochrome Yellow 2GS (disodium salt of 2-hydroxy-5-[(4-sulfophenyl)azo]-benzoic acid) is reported. In a 5-fold excess over Fe (111) concentration the organic reagent, R form with Fe (111) within pH range 2.79-3.00 a 1:2 (Fe:R) stable complex. The value of the total stability constant beta(s) = 3.023.10(5) +/- 1.55.10(5) L(2).mol(-2) was determined, which indicates the formation of a rather stable complex. On this basis a spectrometric method for the quantitative determination of traces of iron (111) was proposed. The method is sensitive, accurate and reproducible, being characterized by a detection limit of 0.11 mg.L(-1), a linearity range between 0.3-5.0 mu g.mL(-1), a recovery of 98.45% +/- 1.38%, as well as a good repeatability and reproducibility, characterized by relative standard deviations of 1.537% and 1.365%, respectively. This method was applied in order to determine the iron contents in samples of drinking water and natural mineral water.
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页码：85 / +
页数：9
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