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Determination of cadmium, cobalt, copper, nickel and lead in soil extracts by dithizone extraction and atomic absorption spectrometry with electrothermal atomization



Determination of cadmium, cobalt, copper, nickel and lead in soil extracts by dithizone extraction and atomic absorption spectrometry with electrothermal atomization



Analytica Chimica Acta 106(2): 319-324



Interferences in the analysis of acetic acid, pyrophosphate and acid oxalate extracts of soils for cadmium, cobalt, copper, nickel and lead were eliminated by extraction of these extracts with dithizone in chloroform. Treatment of the initial extract with hydroxylammonium chloride to reduce Fe3+ to Fe2+ increased the percentage recovery by up to 25%. Complete recovery of the metal-dithizone complexes was ensured by extracting twice from the aqueous phase at pH 8.5 and 9.5.

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Accession: 000628975

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DOI: 10.1016/s0003-2670(01)85015-7


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