Extractive spectrophotometric determination of vanadium(v) using 3-hydroxy-2-(4-methoxyphenyl)-6-methyl-4H-chromen-4-one

Authors
Agnihotri, N Dass, R Mehta, JR
Citation
N. Agnihotri et al., Extractive spectrophotometric determination of vanadium(v) using 3-hydroxy-2-(4-methoxyphenyl)-6-methyl-4H-chromen-4-one, J INDIAN CH, 76(8), 1999, pp. 421-423
Citations number
14
Categorie Soggetti
Chemistry
Journal title
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
ISSN journal
00194522 → ACNP
Volume
76
Issue
8
Year of publication
1999
Pages
421 - 423
Database
ISI
SICI code
0019-4522(199908)76:8<421:ESDOVU>2.0.ZU;2-I
Abstract
A simple, sensitive, rapid and selective method for the spectrophotometric determination of vanadium(v) in trace amounts is proposed, using 3-hydroxy- 2-(4-methoxyphenyl)-6-methyl-4H-chromen-4-one (HL) as a complexing agent an d extracting the coloured 1 :2 (metal : ligand) complex into 1,2-dichloroet hane from 0.1 M CN3COOH solution. It obeys Beer's law in the concentration range 0.23-2.45 mu g ml(-1) V-V having molar absorptivity and Sandell's sen sitivity of 2.54 x 10(4) dm(3) mol(-1) cm(-1) and 0.00198 mu g cm(-2) at 40 0 nm. The method has been applied satisfactorily to the analysis of various synthetic and technical samples.