Química Nova | |
Design and evaluation of a continuous flow, integrated nebulizer-hydride generator for flame atomic absorption spectrometry | |
Miguel Murillo1  Nereida Carrión1  Jorge Colmenares1  Juan Romero1  Gladys Alvarado1  Manuel Ríos1  Freddy Angulo1  | |
[1] ,Universidad Central de Venezuela Facultad de Ciencias Escuela de QuímicaCaracas,Venezuela | |
关键词: nebulizer-hydride generation; arsenic; selenium; | |
DOI : 10.1590/S0100-40422008000600008 | |
来源: SciELO | |
【 摘 要 】
An evaluation of the performance of a continuous flow hydride generator-nebulizer for flame atomic absorption spectrometry was carried out. Optimization of nebulizer gas flow rate, sample acid concentration, sample and tetrahydroborate uptake rates and reductant concentration, on the As and Se absorbance signals was carried out. A hydrogen-argon flame was used. An improvement of the analytical sensitivity relative to the conventional bead nebulizer used in flame AA was obtained (2 (As) and 4.8 (Se) µg L-1). Detection limits (3σb) of 1 (As) and 1.3 (Se) µg L-1 were obtained. Accuracy of the method was checked by analyzing an oyster tissue reference material.
【 授权许可】
CC BY-NC
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
【 预 览 】
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RO202005130062508ZK.pdf | 175KB | download |