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- W2062362484 abstract "Abstract Solid sampling graphite furnace atomic absorption spectrometry (SS-GF AAS) was investigated as a potential technique for the routine determination of trace elements in mineral coal and cadmium, copper and lead were chosen as the model elements. Cadmium and lead could be determined at their main resonance lines at 228.8 nm and 283.3 nm, respectively, but an alternate, less sensitive line had to be used for the determination of copper because of the high copper content in coal. No modifier was necessary for the determination of copper and calibration against aqueous standards provided sufficient accuracy of the results. For the determination of cadmium and lead two different modifiers were investigated, palladium and magnesium nitrates in solution, added on top of each sample aliquot before introduction into the atomizer tube, and ruthenium as a ‘permanent’ modifier. Both approaches gave comparable results, and it is believed that this is the first report about the successful use of a permanent chemical modifier in SS-GF AAS. Calibration against solid standards had to be used for the determination of cadmium and lead in order to obtain accurate values. The agreement between the values found by the proposed procedure and the certificate values for a number of coal reference materials was more than acceptable for routine purposes. The detection limits calculated for 1 mg of coal sample using the ‘zero mass response’ were 0.003 and 0.007 μg g −1 for cadmium with the permanent modifier and the modifier solution, respectively, approximately 0.04 μg g −1 for lead, and 0.014 μg g −1 for copper." @default.
- W2062362484 created "2016-06-24" @default.
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- W2062362484 date "2001-10-01" @default.
- W2062362484 modified "2023-10-18" @default.
- W2062362484 title "Determination of cadmium, copper and lead in mineral coal using solid sampling graphite furnace atomic absorption spectrometry" @default.
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- W2062362484 doi "https://doi.org/10.1016/s0584-8547(01)00336-6" @default.
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