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vol.45 número4Dendrimers based on cyclophosphazene unit and containing iron (III)CHEMICAL CHARACTERIZATION OF A MUNICIPAL LANDFILL AND ITS INFLUENCE ON THE SURROUNDING ESTUARINE SYSTEM, SOUTH CENTRAL CHILE índice de autoresíndice de assuntospesquisa de artigos
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Boletín de la Sociedad Chilena de Química

versão impressa ISSN 0366-1644

Resumo

YANEZ, J.  e  BERNDT, H.. Nuevo sistema integrado cromatografía líquida de alta resolución / nebulizador hidráulico de alta presión y temperatura (HPLC/HT-HHPN) para la separación automática de la matriz en la determinación de metales en salmueras con espectrometría de absorción atómica (FAAS). Bol. Soc. Chil. Quím. [online]. 2000, vol.45, n.4, pp.535-549. ISSN 0366-1644.  http://dx.doi.org/10.4067/S0366-16442000000400004.

An integrated HPF-system using HPLC and HT-HHP-nebulizer is used for matrix separation by the determination of heavy metals in highly concentrated solutions with FAAS. The separation of the matrix (NaCl) is achieved in a HPLC RP-C18 column after heavy metal complexing with trans-1,2-diaminciclohexane-N,N,N’,N’-tetraacetic acid (CDTA). Matrix separation and the metal determination can be realized in less than one minute, without any interference from the matrix. The detection limits of Cd(II), Co(II), Cr(VI), Cu(II), Mn(II) and Zn(II) by FAAS were improved in one order of magnitude in compare with the direct determination by pneumatic nebulization nebulizer.

Palavras-chave : Heavy metals; matrix interferences; saline solutions; sample pretreatment; nebulization; HT-HHPN.

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