Artigo de Periódico
Development of an analytical approach for determination of total arsenic and arsenic (III) in airborne particulate matter by slurry sampling and HG-FAAS
Fecha
2010Registro en:
0026-265X
v. 96, n. 1
Autor
Macedo, Samuel Marques
Santos, Debora C. dos
Jesus, Raildo M. de
Rocha, Gisele Olímpio da
Ferreira, Sergio Luis Costa
Andrade, Jailson Bittencourt de
Macedo, Samuel Marques
Santos, Debora C. dos
Jesus, Raildo M. de
Rocha, Gisele Olímpio da
Ferreira, Sergio Luis Costa
Andrade, Jailson Bittencourt de
Institución
Resumen
Slurry sampling (SS) with hydride generation atomic absorption spectrometry (HG-AAS) was used to analyze 3 particulate matter samples collected in the Bananeira Village, Brazil, in 2005. The relative standard deviation
(RSD), used to assess the precision, was lower than 4.8%. The accuracy of this method was confirmed by the analysis of certified atmospheric particulate matter urban dust reference material SRM 1649a. This method
(SS/HG-AAS) was used to determine total arsenic and arsenic (III) in three particulate matter samples. In these
samples, the total arsenic concentrations varied from 3.8 to 20.0 ng m−3, while As (III) concentrations varied from 2.7 to 10.5 ng m−3. All samples were also analyzed using acid digestion in digest block with cold finger and detection for HG-AAS. A paired t-test demonstrated no significant difference (95% CL) between the results
obtained using these two sample preparation procedures. The limit of quantification, calculated considering themass of particulate matter collected on every filter, was 0.6 ng m−3 for As total and 1.0 ng m−3 for As (III).