Design and evaluation of a continuous flow, integrated nebulizer-hydride generator for flame atomic absorption spectrometry

Química Nova

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】

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