Comparison of metallic and ceramic tubes as atomization cells for tin determination by TS-FF-AAS
| Autor: | Lobo, Fabiana Aparecida [UNESP], Villafranca, Ana Cristina [UNESP], De Oliveira, Adriana Paiva, De Moraes, Mercedes [UNESP] |
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| Přispěvatelé: | Universidade Estadual Paulista (UNESP), UFMT - Universidade Federal do Mato Grosso |
| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| Popis: | Made available in DSpace on 2022-04-28T20:16:08Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-01-01 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 (998% 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). Departamento de Química Analítica UNESP-Universidade Estadual Paulista, P.O. Box 355, 14801-970, Araraquara-SP Departamento de Química UFMT - Universidade Federal do Mato Grosso, 78060-900, Cuiabá-MT Departamento de Química Analítica UNESP-Universidade Estadual Paulista, P.O. Box 355, 14801-970, Araraquara-SP |
| Databáze: | OpenAIRE |
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