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Type: Artigo de periódico
Title: Determination Of Arsenic In Contaminated Waters Using Energy Dispersive X-ray Fluorescence [determinação De Arsênio Em águas Contaminadas Usando Fluorescência De Raios-x Por Energia Dispersiva]
Author: Pataca L.C.M.
Bortoleto G.G.
Bueno M.I.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 Mylar™ 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.
Rights: aberto
Identifier DOI: 
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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