Determination of arsenic in contaminated waters using energy dispersive X-ray fluorescence

Química Nova

Pataca, Luiz Carlos M.¹  Bortoleto, Gisele G.¹  Bueno, Maria Izabel M. S.¹  Universidade Estadual de Campinas¹ 

关键词: arsenic;    natural water;    EDXRF.;   

DOI  :  10.1590/S0100-40422005000400004

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 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】

Unknown