Automated flow-injection method for cadmium determination with pre-concentration and reagent preparation on-line

Química Nova

Universidad Nacional del Sur, Argentine¹  Di Nezio, María S.¹  Band, Beatriz S. Fernández¹  Palomeque, Miriam E.¹ 

关键词: Cd (II);    preconcentration;    FIA.;   

DOI  :  10.1590/S0100-40422005000100025

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The spectrophotometric determination of Cd(II) using a flow injection system provided with a solid-phase reactor for cadmium preconcentration and on-line reagent preparation, is described. It is based on the formation of a dithizone-Cd complex in basic medium. The calibration curve is linear between 6 and 300 µg L-1 Cd(II), with a detection limit of 5.4 µg L-1, an RSD of 3.7% (10 replicates in duplicate) and a sample frequency of 11.4 h—1. The proposed method was satisfactorily applied to the determination of Cd(II) in surface, well and drinking waters.

【 授权许可】

Unknown