Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7682669 | Talanta | 2013 | 6 Pages |
Abstract
The present work describes a metallic tube as hydride atomizer for atomic absorption spectrometry. Its performance is evaluated through tin determination, and the accuracy of the method assessed through the analysis of sediment and water samples. Some chemical parameters (referring to the generation of the hydride) such as acid, NaOH and THB concentrations, as well as physical parameters (referring to the transport of the hydride) such as carrier, acetylene, air flow-rates, flame composition, coil length, tube hole area, among others, are evaluated for optimization of the method. Scanning electron microscopy is used for evaluating morphological parameters in both new and used (after 150 h) tube atomizers. The method presents linear Sn concentration from 50 to 1000 µg Lâ1 (r>0.9995; n=3) and the analytical frequency of ca. 40 hâ1. The limit of detection (LOD) is 7.1 µg Lâ1 and the precision, expressed as RSD is less than 4% (200 µg Lâ1; n=10). The accuracy is evaluated through reference materials, and the results are similar at 95% confidence level according to the t-test.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Rodrigo Moretto Galazzi, Marco Aurélio Zezzi Arruda,