Comparison of metallic and ceramic tubes as atomization cells for tin determination by TS-FF-AAS
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
01/01/2007
|
Resumo |
This work describes the development of an analytical procedure for on-line tin determination using thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS). Two tubes were evaluated as atomization cells: a metallic tube (Ni-Cr, principal components composition: 73.95% Ni and 16.05% Cr) and a ceramic tube (99.8% Al2O3). The use of air as the carrier was made by employing a Rheodyne valve to inject the samples, allowing an analytical frequency of 90 h(-1) and avoiding sample dispersion. The carrier flow rate (air), sample volume injected, and acid concentration (HCl) were evaluated for the optimization of the TS-FF-AAS system. The sensitivity for 50 mL of analytical solution with TS-FF-AAS was 2 and 5 times higher (to metallic and ceramic tube, respectively) than using an acetylene-nitrous oxide flame with pneumatic aspiration (requiring a sample volume of approximately 20 times higher. |
Formato |
17-23 |
Identificador |
Atomic Spectroscopy. Shelton: Perkin-elmer Corp, v. 28, n. 1, p. 17-23, 2007. 0195-5373 http://hdl.handle.net/11449/32286 WOS:000245448700003 |
Idioma(s) |
eng |
Publicador |
Perkin-elmer Corp |
Relação |
Atomic Spectroscopy |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |