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http://nopr.niscpr.res.in/handle/123456789/46551| Title: | Extraction and spectrophotometric determination of vanadium with erio-chrome in presence of a cationic surfactant |
| Authors: | Azanarez, Jose Vidal, Juan Carlos Navas, Miguel Angel Diaz, Carmelo |
| Issue Date: | Dec-1990 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | A method for extraction and spectrophotometric determination of vanadium at the 0.05-0.8 μg ml-1 level is described. Vanadium (V) is first extracted with N-phenylbenzohydroxamic acid into chloroform and then back-extracted with 0.1 M NaOH with simultaneous reduction of V(V) to V(IV) in buffer medium (pH 4.7) by ascorbic acid and formation of a ternary complex with eriochrome cyanine R (ECR) and cetyltrimethylammonium bromide (CTAB). Addition of cationic surfactant such as CTAB improves sensitivity of the determination, giving a molar absorptivity for ternary V(IV)-ECR-CTAB complex of 6.81 104 dm3 mol-1 cm-1 at 575 nm. |
| Page(s): | 1240-1241 |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Appears in Collections: | IJC-A Vol.29A(12) [December 1990] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCA 29A(12) 1240-1241.pdf | 178.08 kB | Adobe PDF | View/Open |
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