On-line preconcentration system coupled to thermospray flame furnace-AAS for Cadmium determination at sub μg L-1 levels in seawater

Química Nova

Universidad de Concepción, Concepción, Chile¹  González Sepúlveda, Elizabeth¹  Neira Hinojosa, José¹  Universidad Católica de la Santísima Concepción, Chile¹  Artigas Fuentes, Andrea¹ 

关键词: cadmium;    seawater;    TS-FF-AAS.;   

DOI  :  10.1590/S0100-40422011000400025

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

A flow injection on-line pre-concentration system coupled to thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS) for cadmium determination at sub μg L-1 levels in seawater samples was developed. The on-line system was evaluated by analysing cadmium containing in a synthetic seawater matrix (2.5% m/v NaCl, 0.5% m/v MgCl2 and 0.8% m/v CaCl2). A sample volume of 2 mL allows determining Cd with a detection limits of 30 ng L-1 (3* σblank/slope), pre-concentration factor of 34 and repeatability of 1,8% (calculated as RSD, N=8 and containing 200 ng L-1 of Cd ).

【 授权许可】

Unknown