ISSN:
1436-5073
Keywords:
electrothermal atomic absorption spectrometry
;
seawater
;
toxic trace metals determination
;
extraction/preconcentration
;
Kelex-100 impregnated silica C18
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The determination of the trace metals Cd, Pb and Cu in seawater by electrothermal atomic absorption spectrometry (ETA-AAS) has been investigated. A combination of the platform with mixed palladium nitrate-magnesium nitrate as matrix modifier and Zeeman background correction allows Cd an Pb to be determined by aqueous standard calibration in appropriately diluted seawater samples. Copper can be determined in undiluted seawater samples without chemical modification using a standard additions method. Detection limits (3σ) of 2.97,5.27 and 1.1 μgl−1 are obtained for Cd, Pb and Cu respectively. A Kelex-100 impregnated silica C18 material (Kelex 100-C18) has been tried and has proved to be effective as a column packing for extraction/preconcentration of these metals from seawater. Using the column extraction method, the sensitivity of the graphite furnace technique is enhanced 50-fold using a 10 μl injection volume. Thus, the determination of the studied three metals in seawater at the ng.l−1 level could be achieved.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01243317
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