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Development of a coupled liquid chromatography-isotope dilution inductively coupled plasma mass spectrometry method for lead speciation

✍ Scribed by Alistair A. Brown; Les Ebdon; Steve J. Hill

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
833 KB
Volume
286
Category
Article
ISSN
0003-2670

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✦ Synopsis

A method has been developed for lead speciation using liquid chromatography with isotope dilution inductively coupled plasma mass spcctrometry W-ID-ICP-MS).

Inorganic lead (Pb*+), trimethyllead (Me,Pb+) and triethyllead (EtsPb+) were separated on a S-pm Hypersil ODS column using a programmed gradient of 10: 90 to 30: 70 methanol-buffer eluent. The buffer was prepared by mixing equal amounts of 0.1 mol 1-l sodium acetate and acetic acid each containing 4 mm01 1-l sodium pentanesulfonic acid. To minimise the dead volume of the interface a single pass 40 ml volume spray chamber with a concentric glass nebuliser was used to coupled the LC and ICP-MS. Best precision isotope ratio measurements were obtained with peak jumping and short dwell times (SO ps). The overall detection limit (3~) for trimethyllead ions was 0.48 ng g-' as lead.

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