Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1246477 | Talanta | 2006 | 7 Pages |
Abstract
A sensitive and efficient flow injection preconcentration and matrix-separation technique using exfoliated graphite (EG) as column material was developed prior to flame atomic absorption spectrometry (FAAS) determination of palladium(II) in street/fan blade dust and rock samples. The method is based on the sorption of palladium(II)-diethylammonium dithiocarbamate chelate (which was found to be better among various thioligands) complex on to EG material and its subsequent elution with acidified methanol (0.01 M HCl in methanol). Using 8 ml of the sample, the detection limit achieved was 1.0 μg lâ1. The accuracy of the method developed was checked by analysing certified reference material SARM-7. The precision obtained for five successive determination of 100 μg lâ1 of palladium(II) was 2.4%. The performance of EG material was compared with allotropes of carbon in terms of pH, chelate concentration, weight of column material, sensitivity enhancement (w.r.t. conventional FAAS), detection limit, calibration range, selectivity and precision. Furthermore, performance of the EG material packed column was compared with commercially available C18 bonded silica gel/alumina columns for on-line FIA-FAAS determination of palladium(II).
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
R.S. Praveen, S. Daniel, T. Prasada Rao, S. Sampath, K. Sreenivasa Rao,