Issue 11, 2004

Air driven on-line separation and preconcentration on a C18 column coupled with thermospray flame furnace AAS for the determination of cadmium and lead at μg l−1 levels

Abstract

A simple and sensitive method for the determination of cadmium and lead at μg l−1 and sub-μg l−1 levels by on-line separation and preconcentration coupled with thermospray flame furnace AAS (TS-FF-AAS) was developed. Compressed air was used to drive the sample through the 3 cm HPLC C18 RP column and the 500 μl eluate to the TS-FF-AAS. The chelating reagent ammonium pyrrolidinedithiocarbamate was immobilized onto the column as a solution in the eluent (60% v/v methanol) simultaneously with the elution of the previous preconcentrated sample. Loading of sample volumes up to 20 ml was possible. The detection limits for cadmium and lead using 20 ml sample volume were 0.007 and 0.17 μg l−1, respectively. RSD values were typically about 4%. The combined effect of preconcentration and TS-FF-AAS yielded enhancement factors towards conventional flame AAS of 1960 and 610 for cadmium and lead, respectively.

Article information

Article type
Technical Note
Submitted
16 Jun 2004
Accepted
21 Sep 2004
First published
05 Oct 2004

J. Anal. At. Spectrom., 2004,19, 1507-1509

Air driven on-line separation and preconcentration on a C18 column coupled with thermospray flame furnace AAS for the determination of cadmium and lead at μg l−1 levels

E. Ivanova, H. Berndt and E. Pulvermacher, J. Anal. At. Spectrom., 2004, 19, 1507 DOI: 10.1039/B409182E

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