Extractive spectrophotometric determination of vanadium(v) using 3-hydroxy-2-(4-methoxyphenyl)-6-methyl-4H-chromen-4-one
| Main Authors: | N. Agnihotri, R. Dass, J. R. Mehta |
|---|---|
| Format: | Article Journal |
| Bahasa: | eng |
| Terbitan: |
, 1999
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/5852270 |
Daftar Isi:
- Department of Chemistry, Kurukshetra University, Kurukshetra-136 119, India Manuscript received 9 December 1998, revised 30 March 1999, accepted 9 April 1999 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 and extracting the coloured 1 : 2 (metal : ligand) complex into 1,2-dichloroethane from 0.1 M CH3COOH solution. It obeys Beer's law in the concentration range 0.23-2.45 pg m1-1 V" having molar absorptivity and Sandell's sensitivity of 2.54 x 104 dm3 mol-t cm-I and 0.00198 fig cm-2 at 400 nm. The method has been applied satisfactorily to the analysis of various synthetic and technical samples.