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Type: Artigo de periódico
Title: Determinação de arsênio em águas contaminadas usando fluorescência de raios-X por energia dispersiva
Title Alternative: Determination of arsenic in contaminated waters using energy dispersive X-ray fluorescence
Author: Pataca, Luiz Carlos M.
Bortoleto, Gisele G.
Bueno, Maria Izabel M. S.
Abstract: This work proposes a simple, fast and inexpensive method to determine As in natural waters, using X-ray fluorescence. 50 µL of each sample containing 100 mg L-1 of yttrium as internal standard were deposited over a 2.5 µm thickness MylarTM film. The samples were dried at 50 °C for 2 h. X-ray spectra were obtained using an EDXRF apparatus. The accuracy was determined by analyte addition/recovery and by comparison with Hydride Generation Atomic Absorption Spectrometry (HG AAS). A recovery of about 100% was obtained and the results were in good agreement with HG AAS. The method showed a relative standard deviation of 6.8% and a detection limit of 10.5 µg L-1 of As.
Subject: arsenic
natural water
Editor: Sociedade Brasileira de Química
Rights: aberto
Identifier DOI: 10.1590/S0100-40422005000400004
Date Issue: 1-Aug-2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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