Online flow injection preconcentration and flame atomic absorption spectrometric determination of palladium(II) using inorganic and inorganic-organic hybrid materials-packed microcolumns

Various inorganic and inorganic-organic hybrid materials-packed columns, including commercially available C-18 bonded silica gel and alumina columns, were tested for the on-line preconcentration of palladium(II) and subsequent determination by flame atomic absorption spectrometry (AAS). Several thioligands were investigated for complexing palladium(II) and subsequent sorption, elution, and determination by flame atomic absorption spectrometer. Among them, diethyl ammonium dithiocarbamate was found to give the highest enrichment factor for a given concentration of palladium(II) under optimized conditions. After testing the accuracy of the developed method by analyzing certified reference material (SARM 7), it was applied for the analysis of street and domestic fan blade dust samples.