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http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1709| DMA and inorganic arsenic determination by coupling multisyringe flow injection analysis (MSFIA) to HG-AFS with on-line photooxidation | |
| LAURA LIZETH CHAPARRO CARRILLO | |
| Acceso Abierto | |
| Sin Derechos Reservados | |
| MSFIA | |
| A multisyringe flow injection approach has been coupled to a hydride generation system with UV photo-oxidation for the determination of organic arsenic by atomic fluorescence spectrometry. The oxidant solution (K2S2O8) and the sample pass through a UV irradiation, where the organic arsenic is transformed to As(V). The volatile hydride (arsine) is generated by a simultaneous injection of a reducing solution (NaBH4), hydrochloric acid solution and the oxidized sample. The sample and reagents are dispensed into a gas–liquid separation cell. An argon flow delivers the arsine into the flame of the atomic fluorescence instrument. A hydrogen flow has been used to support the flame. Nitrogen has been employed as a drier gas. This technique was validated by means of a solid reference material with good agreement with the certified values. Satisfactory results for organic arsenic determination by means of the developed methodology were obtained. The proposed methodology offers several advantages, such as increasing the sampling frequency, high sensitivity and decreasing of reagents and sample consumption, which leads to a lower waste generation | |
| 2011 | |
| Memoria de congreso | |
| Inglés | |
| OTRAS | |
| Versión revisada | |
| submittedVersion - Versión revisada | |
| Aparece en las colecciones: | Artículos de Congresos |
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|---|---|---|---|
| Artículo publicado_Chaparro_ICOBTE 2011.pdf | 114.8 kB | Adobe PDF | Visualizar/Abrir |