Preconcentración y atomización con tubo en la llama para la determinación de Cadmio en agua de mar

Química Nova

Elizabeth González Sepúlveda²  Andrea Artigas Fuentes²  José Neira Hinojosa¹ 

[1] ,Universidad Católica de la Santísima Concepción Facultad de Ciencias Departamento de Química Ambiental,Chile

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

DOI  :  10.1590/S0100-40422011000400025

来源: SciELO

【 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】

CC BY-NC   
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