DETERMINATION OF TRACE HEAVY-METALS BY FLOW-INJECTION ANALYSIS WITH ADSORPTIVE STRIPPING VOLTAMMETRIC DETECTION

Authors
STROZIK M KUBIAK WW KOWALSKI Z
Citation
M. Strozik et al., DETERMINATION OF TRACE HEAVY-METALS BY FLOW-INJECTION ANALYSIS WITH ADSORPTIVE STRIPPING VOLTAMMETRIC DETECTION, Chemia Analityczna, 40(1), 1995, pp. 1-12
Citations number
15
Categorie Soggetti
Chemistry Analytical
Journal title
Chemia Analityczna → ACNP
ISSN journal
00092223
Volume
40
Issue
1
Year of publication
1995
Pages
1 - 12
Database
ISI
SICI code
0009-2223(1995)40:1<1:DOTHBF>2.0.ZU;2-U
Abstract
The adsorption of heavy metal complexes with 8-hydroxyquinoline at a h anging mercury drop electrode was used For determination of lead and c admium traces in the Row injection system. The best results were obtai ned in 0.01 mol l(-1) ammonia buffer of pH 9.5. The optimal concentrat ion of oxine differs for lead a nd cadmium. Selection of the proper ti me for starting deposition and stripping allowed to obtain the signal practically independent of flow rate. For 200 mu l samples the respons e was linear over the entire examined concentration range. The detecti on limits were 1 nmol l(-1) for Cd and 5 nmol l(-1) for Pb. Possible i nterferences as well as conditioning of the system are also discussed. Examples of determinations in river water are presented.