Determination of titanium(IV) and chromium(VI) with 2,7-dichlorochromotropic acid and 1,5-diphenylcarbazide on the solid phase

被引：0

作者：

Shvoeva, O. P. ^{[1
]}

Dedkova, V. P. ^{[1
]}

Savvin, S. B. ^{[1
]}

Grechnikov, A. A. ^{[1
]}

机构：

[1] Russian Acad Sci, Vernadsky Inst Geochem & Analyt Chem, Moscow 119991, Russia

来源：

JOURNAL OF ANALYTICAL CHEMISTRY | 2015年 / 70卷 / 08期

基金：

俄罗斯基础研究基金会;

关键词：

Ti(IV); Cr(VI); diffuse reflection spectroscopy; PANV-KU-2; PANV-AV-17; 2,7-dichlorochromotropic acid; 1,5-diphenylcarbazide;

D O I：

10.1134/S106193481508016X

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Possibility of the selective determination of Ti(IV) and Cr(VI) by diffuse reflection spectroscopy after their simultaneous adsorption from one sample on a two-layer substrate is studied. Titanium(IV) is adsorbed on a fiber filled with a cation exchanger (PANV-KU-2) and determined with 2,7-dichlorochromo-tropic acid; chromium(VI) is adsorbed on a fiber filled with an anion exchanger (PANV-AV-17) and determined with 1,5-diphenylcarbazide. Conditions are selected for the simultaneous adsorption of titanium and chromium in the batch and dynamic modes. Conditions are optimized for the determination of titanium with 2,7-dichlorochromotropic acid on PANV-KU-2. The selectivity of titanium and chromium determination in the presence of foreign ions is studied. Calibration graphs are linear in the ranges 5-40 and 2-20 ng/mL for Ti(IV) and Cr(VI), respectively; the detection limits are 4 and 2 ng/mL. The possibility of determining Ti(IV) and Cr(VI) in one sample at their ratios from 5: 1 to 1: 4 is shown.

引用

页码：915 / 919

页数：5

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