Speciation of Chromium by Direct Coupling of Ion Exchange Chromatography With Inductively Coupled Plasma Mass Spectrometry

Barnowski, Carsten; Jakubowski, Norbert; Stuewer, Dietmar; Broekaert, J. A. C.

doi:10.1039/a702120h

Cited by 100 publications

(48 citation statements)

References 21 publications

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“…Chromium (III) compounds are one of the essential trace nutrients in human bodies, and play an important role in the metabolism of glucose and certain lipids, whereas chromium (VI) compounds are toxic and carcinogenic [2][3][4]. The United State Environmental Protection Agency (USEPA) has regulated the permissible limit of 0.1 mg l −1 of total chromium in drinking water.…”

mentioning

confidence: 99%

On-line preconcentration using dual mini-columns for the speciation of chromium(III) and chromium(VI) and its application to water samples as studied by inductively coupled plasma-atomic emission spectrometry

Sumida

Ikenoue

Hamada

et al. 2005

Talanta

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On-line preconcentration system for the selective, sensitive and simultaneous determination of chromium species was investigated. Dual mini-columns containing chelating resin were utilized for the speciation and preconcentration of Cr (III) and Cr (VI) in water samples. In this system, Cr (III) was collected on first column packed with iminodiacetate resin. Cr (VI) in the effluent from the first column was reduced to Cr (III), which was collected on the second column packed with iminodiacetate resin. Hydroxyammonium chloride was examined as a potential reducing agent for Cr (VI) to Cr (III).The effects of pH, sample flow rate, column length, and interfering ions on the recoveries of Cr (III) were carefully studied. Five milliliters of a sample solution was introduced into the system. The collected species were then sequentially washed by 1M ammonium acetate, eluted by 2M nitric acid and measured by ICP-AES. The detection limit for Cr (III) and Cr (VI) was 0.08 and 0.15 ųg l -1 , respectively. The total analysis time was about 9.4 min. The developed method was successfully applied to the speciation of chromium in river, tap water and wastewater samples with satisfied results.

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confidence: 99%

On-line preconcentration using dual mini-columns for the speciation of chromium(III) and chromium(VI) and its application to water samples as studied by inductively coupled plasma-atomic emission spectrometry

Sumida

Ikenoue

Hamada

et al. 2005

Talanta

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“…Dissolved chromium is usually found in natural water in two different oxidation states, Cr(III) and Cr(VI), which have contrasting physiological effects. Cr(III) is considered an essential trace element for the maintenance of an effective glucose, lipid, and protein metabolism in mammals [2]. On the other hand, Cr(VI) can be toxic for biological systems [3,4], and water soluble Cr(VI) is extremely irritating and toxic to human body tissue owing to its oxidizing potential and easy permeation of biological membranes [5,6].…”

Section: Introductionmentioning

confidence: 99%

Speciation of chromium by selective separation and preconcentration of Cr(III) on an immobilized nanometer titanium dioxide microcolumn

2006

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Nanometer titanium dioxide immobilized on silica gel (immobilized nanometer-scale TiO2 particles) was prepared by a sol-gel method and characterized by X-ray diffraction and scanning electron microscopy. The adsorptive behavior of Cr(III) and Cr(VI) on immobilized nanometer TiO2 was assessed. Cr(III) was selectively sorbed on immobilized nanometer TiO2 in the pH range of 7-9, while Cr(VI) was found to remain in solution. A sensitive and selective method has been developed for the speciation of chromium in water samples using an immobilized nanometer TiO2 microcolumn and inductively coupled plasma atomic emission spectrometry. Under optimized conditions (pH 7.0, flow rate 2.0 mL/min), Cr(III) was retained on the column, then eluted with 0.5 mol/L HNO3 and determined by ICP-AES. Total chromium was determined after the reduction of Cr(VI) to Cr(III) by ascorbic acid. The adsorption capacity of immobilized nanometer TiO2 for Cr(III) was found to be 7.04 mg/g. The detection limit for Cr(III) was 0.22 ng/mL and the RSD was 3.5% (n = 11, c = 100 ng/ mL) with an enrichment factor of 50. The proposed method has been applied to the speciation of chromium in water samples with satisfactory results.

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“…For this reason it is useful to monitor separate species of chromium because its total content does not provide sufficient information about possible health hazards. Environmental concern about Cr(VI) has prompted numerous methods for its determination including spectrophotometry [2 -4], atomic absorption spectrometry [5 -8], inductively coupled plasma mass spectrometry [9,10] and stripping voltammetry [11 -20].…”

Section: Introductionmentioning

confidence: 99%

Determination of Cr(VI) by Catalytic Adsorptive Stripping Voltammetry with Application of Nitrilotriacetic Acid as a Masking Agent

2004

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A selective and sensitive method for determination of traces of Cr(VI) in the presence of a large excess of Cr(III) by differential pulse catalytic adsorptive stripping voltammetry is presented. For minimization of Cr(III) interference nitrilotriacetic acid was used as a masking agent. The determinations were performed in a flow system. The calibration plot was linear from 1 Â 10 À10 to 1 Â 10 À8 mol L À1 for accumulation time 60 s. The relative standard deviation for 3 Â 10 À9 mol L À1 Cr(VI) was 4.1% (n ¼ 5). The detection limit for an accumulation time of 60 s was 4 Â 10 À11 mol L À1. The influence of common foreign ions is also presented. The performance of the method was verified by analysis of certified reference material for Cr(VI) and comparing the results of analyses of natural water samples with those obtained by another accepted electrochemical method.

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Speciation of Chromium by Direct Coupling of Ion Exchange Chromatography With Inductively Coupled Plasma Mass Spectrometry

Cited by 100 publications

References 21 publications

On-line preconcentration using dual mini-columns for the speciation of chromium(III) and chromium(VI) and its application to water samples as studied by inductively coupled plasma-atomic emission spectrometry

On-line preconcentration using dual mini-columns for the speciation of chromium(III) and chromium(VI) and its application to water samples as studied by inductively coupled plasma-atomic emission spectrometry

Speciation of chromium by selective separation and preconcentration of Cr(III) on an immobilized nanometer titanium dioxide microcolumn

Determination of Cr(VI) by Catalytic Adsorptive Stripping Voltammetry with Application of Nitrilotriacetic Acid as a Masking Agent

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