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Type: Artigo de periódico
Title: Optimization Of A Hydride Generation Metallic Furnace Atomic Absorption Spectrometry (hg-mf-aas) Method For Tin Determination: Analytical And Morphological Parameters Of A Metallic Atomizer.
Author: Moretto Galazzi, Rodrigo
Arruda, Marco Aurélio Zezzi
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 L(-1) (r>0.9995; n=3) and the analytical frequency of ca. 40 h(-1). The limit of detection (LOD) is 7.1 µg L(-1) and the precision, expressed as RSD is less than 4% (200 µg L(-1); n=10). The accuracy is evaluated through reference materials, and the results are similar at 95% confidence level according to the t-test.
Subject: Fresh Water
Geologic Sediments
Limit Of Detection
Nebulizers And Vaporizers
Reference Standards
Reproducibility Of Results
Spectrophotometry, Atomic
Hydride Generation
Metallic Furnace
Rights: fechado
Identifier DOI: 10.1016/j.talanta.2013.09.030
Date Issue: 2013
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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