Journal
ANALYTICA CHIMICA ACTA
Volume 429, Issue 2, Pages 227-235Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0003-2670(00)01297-6
Keywords
sea-water analysis; ICP-QMS; pre-concentration; Kelex-100; ICP-SMS; multi-elemental determinations
Categories
Ask authors/readers for more resources
The extraction/pre-concentration capabilities of the liquid ion exchanger 7-(4-ethyl-1-methyloctyl)-8-hydroxyquinoline (Kelex-100) immobilized on octadecyl silica have been evaluated for the analysis of trace metals in sea-water by quadruple ICP-MS (ICP-QMS) and the results are compared with those directly obtained by double focusing ICP-MS (ICP-SMS), after a simple 1 + 4 dilution of the sea-water sample. The retention capabilities of the different materials (Kelex-100 retained on Amberlite XAD-7 and Bondapack C-18 (BC-18)) were evaluated by using copper as test element and ICP-QMS for detection. Kelex-100 supported onto BC-18 provided the best performance and was evaluated, both on-line and off-line, for the pre-concentration of different trace elements present in sea-water.. Using the selected off-line procedure, satisfactory recoveries (95-104%) and adequate detection limits in the ng l(-1) range (V, 10; Ni, 30; Mn, 70; Cu, 170; Zn, 150: Cd, 7; Pb, 10 and U, 1 ng l(-1)) were obtained. Such multi-elemental trace metal determinations in sea-water were also attempted directly, after a simple 1 + 4 dilution of the sample and calibration with internal standards (IS) using different mass resolutions to avoid polyatomic interferences when necessary. The analytical performance characteristics and limitations of both approaches for multi-elemental determinations in coastal sea-water are compared. (C) 2001 Elsevier Science B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available