Automated on-line separation preconcentration system for palladium determination by graphite furnace atomic absorption spectrometry and its application to palladium determination in environmental and food samples |
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Authors: | Rojas F Sánchez Ojeda C Bosch Pavón J M Cano |
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Institution: | aDepartment of Analytical Chemistry, Faculty of Sciences, University of Málaga, E-29071 Málaga, Spain |
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Abstract: | A flow injection (FI) system was used to develop an efficient on-line sorbent extraction preconcentration system for palladium by graphite furnace atomic absorption spectrometry (GFAAS). The investigated metal was preconcentrated on a microcolumn packed with 1,5-bis(di-2-pyridyl)methylene thiocarbohydrazide immobilized on silica gel (DPTH-gel). The palladium is eluted with 40 μl of HCl 4 M and directly introduced into the graphite furnace. The detection limit for palladium under the optimum conditions was 0.4 ng ml?1. This procedure was employed to determine palladium in different samples. |
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Keywords: | Palladium Graphite furnace atomic absorption spectrometry Preconcentration Flow injection |
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