Artículo
Abstract:
The aim of this work is the study of the best conditions for thermal stabilization of tellurium in graphite furnaces under different experimental conditions, including highly concentrated nitric and hydrochloric acids solutions as those resulting of drastic dissolution procedures. The influence of different noble metals used as matrix modifiers in solution or as permanent layers on the graphite furnace will be assessed. Amongst the assayed matrix modifiers, iridium used as permanent has shown the best performance in high concentrations of mineral acids. The mass employed was 20 μg (for 1 ng of Te), with a maximal attainable pyrolysis temperature of 1400 °C without losses of the analyte or sensitivity (height, area and form of the atomization peak), being mo = 20 pg. Some speculations on the mechanisms of thermal stabilization of tellurium in graphite furnaces will be discussed. The potentiality of ETAAS for tellurium determination in technical grade sulfur will be evaluated. Results involving characteristics mass, limit of detection and percentage of recovery of tellurium in a mineralized sulfur sample will be compared with those obtained through a working curve in absence of interferences. © 2005 Elsevier B.V. All rights reserved.
Registro:
| Documento: | Artículo |
| Título: | Thermal stabilization of tellurium in mineral acids solutions: Use of permanent modifiers for its determination in sulfur by GFAAS |
| Autor: | Pedro, J.; Stripekis, J.; Bonivardi, A.; Tudino, M. |
| Filiación: | Area de Química Analítica, Departamento de Química, Universidad Nacional del Litoral, Santiago del Estero 2829, (S3000GL.N), Santa Fe, Argentina Laboratorio de Análisis de Trazas, Departamento de Química Inorgánica, Analítica y Química Física, Ciudad Universitaria, (1428), Buenos Aires, Argentina |
| Palabras clave: | Determination in sulfur; Matrix modifiers; Mineral acids; Noble metals; Tellurium stabilization; Atomization; Furnaces; Graphite; Hydrochloric acid; Iridium; Nitric acid; Precious metals; Sulfur; Thermodynamic stability; Determination in sulfur; Matrix modifiers; Mineral acids; Tellurium stabilization; Tellurium |
| Año: | 2006 |
| Volumen: | 69 |
| Número: | 1 |
| Página de inicio: | 199 |
| Página de fin: | 203 |
| DOI: | http://dx.doi.org/10.1016/j.talanta.2005.09.027 |
| Título revista: | Talanta |
| Título revista abreviado: | Talanta |
| ISSN: | 00399140 |
| CODEN: | TLNTA |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00399140_v69_n1_p199_Pedro |
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Citas:
---------- APA ----------
Pedro, J., Stripekis, J., Bonivardi, A. & Tudino, M. (2006) . Thermal stabilization of tellurium in mineral acids solutions: Use of permanent modifiers for its determination in sulfur by GFAAS. Talanta, 69(1), 199-203.http://dx.doi.org/10.1016/j.talanta.2005.09.027
---------- CHICAGO ----------
Pedro, J., Stripekis, J., Bonivardi, A., Tudino, M. "Thermal stabilization of tellurium in mineral acids solutions: Use of permanent modifiers for its determination in sulfur by GFAAS" . Talanta 69, no. 1 (2006) : 199-203.http://dx.doi.org/10.1016/j.talanta.2005.09.027
---------- MLA ----------
Pedro, J., Stripekis, J., Bonivardi, A., Tudino, M. "Thermal stabilization of tellurium in mineral acids solutions: Use of permanent modifiers for its determination in sulfur by GFAAS" . Talanta, vol. 69, no. 1, 2006, pp. 199-203.http://dx.doi.org/10.1016/j.talanta.2005.09.027
---------- VANCOUVER ----------
Pedro, J., Stripekis, J., Bonivardi, A., Tudino, M. Thermal stabilization of tellurium in mineral acids solutions: Use of permanent modifiers for its determination in sulfur by GFAAS. Talanta. 2006;69(1):199-203.http://dx.doi.org/10.1016/j.talanta.2005.09.027
