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- W2000811770 abstract "Abstract A procedure for the preconcentration and determination of Ag+, Cd2+, Co2+, Cu2+, Ni2+, Pb2+ and Zn2+ is presented. The conditions for the simultaneous extraction of all these metal ions with dithizone in ethyl propionate are described. The metal dithizonates are very stable in ethyl propionate and the chelate-solvent system enhances the sensitivity for the atomic absorption method used for the determination. With 10:1 aqueous-organic solvent ratios, the sensitivities for 1% absorption of the signal range from 0.001 μg/ml for Cd2+ and Zn2+, to 0.004 μg/ml for Pb2+. Interference effects of 38 diverse ions and compounds were studied and their tolerance levels are given. The resulting procedure is very sensitive and selective." @default.
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- W2000811770 title "Concentration and determination of traces of metal ions" @default.
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- W2000811770 doi "https://doi.org/10.1016/s0003-2670(01)95803-9" @default.
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