Evaluation of arsenic and selenium in Brazilian soluble coffee by inductively coupled plasma atomic emission spectrometry with hydride generation-Reference-Cited by-同舟云学术

Evaluation of arsenic and selenium in Brazilian soluble coffee by inductively coupled plasma atomic emission spectrometry with hydride generation

Published:2001-09 Issue:3 Volume:44 Page:233-238
ISSN:1516-8913
Container-title:Brazilian Archives of Biology and Technology
language:
Short-container-title:Braz. arch. biol. technol.

Author:

Santos Éder José dos¹,Oliveira Elisabeth de²

Affiliation:

1. Instituto de Tecnologia do Paraná, Brazil

2. Universidade de São Paulo, Brazil

Abstract

A method for the evaluation of arsenic and selenium in soluble coffee by inductively coupled plasma atomic emission spectrometry with continuous hydride generation to attend the Brazilian food legislation is described. Samples were digested with nitric acid and hydrogen peroxide in a focused microwave system. Slow heating eliminated nitric acid and selenium (VI) was reduced to selenium (IV) by addition of 6 mol/L hydrochloric acid and heating at 90° C under a reflux system. The influence of sample acidity on sensitivity was investigated. Hydrochloric acid 6 mol/L was the most suitable reaction medium. Practical detection limits of 2.0mug/L for As and 1.0mu g/L for Se were achieved and attended the Brazilian food legislation. The results of recoveries on spiked samples demonstrate the reliability and accuracy of the procedure.

Publisher

FapUNIFESP (SciELO)

Subject

Multidisciplinary

Link

http://www.scielo.br/pdf/babt/v44n3/a03v44n3.pdf

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