Química Nova | |
Determinação de arsênio em águas contaminadas usando fluorescência de raios-X por energia dispersiva | |
Luiz Carlos M. Pataca1  Gisele G. Bortoleto1  Maria Izabel M. S. Bueno1  | |
[1] ,Universidade Estadual de Campinas Instituto de Química | |
关键词: arsenic; natural water; EDXRF; | |
DOI : 10.1590/S0100-40422005000400004 | |
来源: SciELO | |
【 摘 要 】
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.
【 授权许可】
CC BY-NC
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
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