Silicon determination in milk by electrothermal atomic absorption spectrometry using palladium as chemical modifier.

作者信息

Bermejo-Barrera P, Barciela-Alonso M C, Domínguez-González R, Bermejo-Barrera A, Cocho De Juan J A, Fraga-Bermúdez J M

机构信息

Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Chemistry, University of Santiago de Compostela, Spain.

出版信息

Anal Bioanal Chem. 2002 Dec;374(7-8):1290-3. doi: 10.1007/s00216-002-1632-0. Epub 2002 Nov 14.

DOI:10.1007/s00216-002-1632-0

PMID:12474099

Abstract

A direct method for silicon determination in milk samples by Electrothermal Atomic Absorption Spectrometry was developed. Palladium was used as chemical modifier at a concentration of 610 mg L(-1); with this modifier, silicon was stable up to 1800 degrees C. The precision and accuracy of the method were investigated. The detection limit was 16.2, 2.7 and 7.2 micro g L(-1) for cows' milk, human milk and infant formula, respectively. The method was applied to silicon determination in 17 infant formula samples, 13 human milk samples and 12 cows' milk samples.

摘要