Combined discrete nebulization and microextraction process for molybdenum determination by flame atomic absorption spectrometry (FAAS)

Química Nova

Jesus, Amanda M. D. de¹  Pereira-Filho, Edenir R.¹  Oviedo, Jenny A.¹  Universidade Federal de São Carlos, São Carlos, Brasil¹  Fialho, Lucimar L.¹ 

关键词: microextraction;    cloud point;    discrete nebulization.;   

DOI  :  10.5935/0100-4042.20140043

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Simple and sensitive procedures for the extraction/preconcentration of molybdenum based on vortex-assisted solidified floating organic drop microextraction (VA-SFODME) and cloud point combined with flame absorption atomic spectrometry (FAAS) and discrete nebulization were developed. The influence of the discrete nebulization on the sensitivity of the molybdenum preconcentration processes was studied. An injection volume of 200 µL resulted in a lower relative standard deviation with both preconcentration procedures. Enrichment factors of 31 and 67 and limits of detection of 25 and 5 µg L-1 were obtained for cloud point and VA-SFODME, respectively. The developed procedures were applied to the determination of Mo in mineral water and multivitamin samples.

【 授权许可】

Unknown