期刊
ANALYTICAL LETTERS
卷 37, 期 10, 页码 2189-2203出版社
TAYLOR & FRANCIS INC
DOI: 10.1081/AL-200026696
关键词
platinum; palladium; preconcentration; biosorption; immobilized algae; environmental samples
The ability of green algae Chlorella vulgaris, immobilized on Cellex-T support, for selective binding of platinum (Pt) and palladium (Pd) from acidic solutions (at pH range 1.5-1.8) has been demonstrated. The use of immobilized algae packed into a microcolumn (150 mg) in a flow mode provides good efficiency and reproducibility of the biosorption process (95.2 +/- 0.4% for Pt and 99.3 +/- 0.9% for Pd). The presence of seven interfering ions up to their 100 mug mL(-1) concentration does not influence Pt and Pd retention on the column. The best efficiency of elution for both metals from the column was obtained with 0.3 mol L-1 thiourea (TU) in 1 mol L-1 hydrochloric acid used as a stripping reagent. The detection limits obtained by the optimized method, followed by graphite furnace atomic absorption spectrometric detection for Pt and Pd, were 0.2 and 0.096 ng mL(-1), respectively. The proposed method was applied for matrix separation and determination of Pt and Pd by graphite furnace atomic absorption spectrometry (GFAAS) in spiked tap water, waste-water, and grass samples.
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