A chromogenic calixarene hydroxamic acid for the sequential separation of Ti(IV) and Zr(IV)

Autor:	Shobhana K. Menon, Usha Pal, M. S. Gidwani, Harjinder Kaur
Rok vydání:	2009
Předmět:	Chloroform Hydroxamic acid Chromogenic Extraction (chemistry) Chloride Analytical Chemistry chemistry.chemical_compound chemistry Reagent Calixarene medicine Organic chemistry Selectivity medicine.drug Nuclear chemistry
Zdroj:	Journal of Analytical Chemistry. 64:104-109
ISSN:	1608-3199 1061-9348
DOI:	10.1134/s1061934809020026
Popis:	A new chromogenic calixarene with hydroxamic acid as chelating agent was synthesized by partial reduction of nitrocalixarene which was subsequently coupled with coumarin chloride. The reagent showed selective and quantitative extraction of Ti(IV) into chloroform at 6 M HCl and that of Zr(IV) at 0.5 M HCl. A facile liquid-liquid extraction method for the separation and spectrophotometric determination of Ti(IV) and Zr(IV) has been proposed. The validity of the method was checked by separating several synthetic mixtures. The method was successfully applied to the analysis of piezoelectric lead-zirconium-titanate (PZT) samples. The method shows remarkable simplicity and selectivity. The method can also be used for the determination of Ti(IV) and Zr(IV) in various environmental samples.
Databáze:	OpenAIRE
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