Speciation analysis of organolead compounds in greenland snow at the femtogram-per-gram level by capillary gas chromatography/atomic emission spectrometry

Ryszard Lobinski (1) , C.F. Boutron , J.-P. Candelone , S. Hong , J. Szpunar-Lobinska (1) , F.C. Adams

1 LCABIE - Laboratoire de Chimie Analytique Bio-Inorganique et Environnement

A method for comprehensive speciation analysis of organolead compounds in polar snow at levels down to femtograms per gram is developed. The analytes are preconcentrated (250:1) in a single-step extraction, derivatized by propylation using a Grignard reagent, and analyzed by capillary gas chromatography with microwave-induced plasma atomic emission detection (GC-MIP AED) after further on-line preconcentration (50:1). Extraction and derivatization efficiencies of organolead species at subpicogram per gram levels and sources of the blank are extensively discussed. A number of snow samples collected at different locations in Greenland are analyzed, providing the first data on organolead levels in polar snow. Tri- and diethyllead species are the only compounds found in the majority of the samples.

Domaines: Chimie analytique

Ryszard Lobinski, C.F. Boutron, J.-P. Candelone, S. Hong, J. Szpunar-Lobinska, et al.. Speciation analysis of organolead compounds in greenland snow at the femtogram-per-gram level by capillary gas chromatography/atomic emission spectrometry. Analytical Chemistry, 1993, 65 (18), pp.2510-2515. ⟨hal-00292002⟩