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• W2033463227 endingPage "247" @default.
• W2033463227 startingPage "242" @default.
• W2033463227 abstract "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." @default.
• W2033463227 created "2016-06-24" @default.
• W2033463227 creator A5016837558 @default.
• W2033463227 creator A5036443199 @default.
• W2033463227 creator A5037897379 @default.
• W2033463227 date "2006-02-01" @default.
• W2033463227 modified "2023-10-08" @default.
• W2033463227 title "Speciation of chromium by selective separation and preconcentration of Cr(III) on an immobilized nanometer titanium dioxide microcolumn" @default.
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• W2033463227 doi "https://doi.org/10.1002/jssc.200500301" @default.
• W2033463227 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/16524098" @default.
• W2033463227 hasPublicationYear "2006" @default.
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