食品中微量元素の共沈法を応用した多元素同時分析法及び食品中のリン酸除去による影響

概要

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In order to carry out multielement determiation method of ten trace elements (Pb, Cd, Sn, Sb, Bi, Be,As, Se, Cr and Ge) in total diet samples by the polarized Zeeman atomic absorption spectrometry, the mostsuitable condition of ashing temprature, atomization temperature was dicided and effects of phosphoruselimination from total diet samples on copreecipitation were studied. The most suitable condition of ashing and atomization temperature was 500℃, 600℃, for Pb and Cd;600℃, 2200℃ for Sn, Sb and Bi ; 400℃, 2700℃ for Be, As and Se ; 800℃, 2800℃ for Cr and Ge,respetively. The most effective preconcentration of each element was the coprecipitation method with addinghydroxide zirconium as 10mg of zirconium at pH 9.5. The effects of the phosphorus elimination from total diet samples on recovery rates of trace elementswere compared among three preconcentration methods, which were non phosphoras elimination, hydroxidezirconium and ammonium molybdenic acid coprecipitation method. Recovery rates of Pb, Cd, Bi and Bewere no effects of phosphorus relimination. Recovery rates of Cr and Ge in hydrooxide zirconiumcoprecipitation method, and those of Sn, Sb, As, Se and Cr in ammonium molybdenic acid coprecipitationmethod clearly increased.
2003-12-15