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http://nopr.niscpr.res.in/handle/123456789/20627| Title: | Liquid-liquid extraction, separation and preconcentration, membrane transportation and ICP-AES determination of vanadium with dibenzo-18-crown-6 |
| Authors: | Agrawal, Y K Menon, S K Jain, V K |
| Issue Date: | May-2003 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Dibenzo-18-crown-6(DB18C6) is used for the liquid-liquid extraction and membrane transporation of vanadium(V).Vanadium is extracted with DB 18C6 in 3.0 M HCl medium using dichloromethane as solvent which forms a colourless complex (λmax 285 nm). The complex obeys Beer's law in the range of 4.25-93.5 ng mL-1. The dichloromethane extract is directly inserted into plasma for inductively coupled plasma atomic emission spectrophotometric (ICP-AES) estimation of vanadium, which enhances the sensitivity several folds and the limits for estimation is 0.2-5.0 ng mL-1 with detection limit 0.05 ng mL-1. The overall formation constant (logβ2Kʹc) and extraction constant (Kcx) calculated are 22.20 and 1.8×10-14 at 25°C, respectively. Vanadium is preconcentrated and determined in sea water, standard samples and environmental samples. |
| Page(s): | 1008-1012 |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Appears in Collections: | IJC-A Vol.42A(05) [May 2003] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCA 42A(5) 1008-1012.pdf | 473.72 kB | Adobe PDF | View/Open |
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