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

• Main Authors: Lobinski, Ryszard, Boutron, C.F., Candelone, J.-P., Hong, S., Szpunar-Lobinska, J., Adams, F.C.
• Other Authors: Laboratoire de Chimie Analytique Bio-Inorganique et Environnement (LCABIE), Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 1993
• Subjects: [CHIM.ANAL]Chemical Sciences/Analytical chemistry; Greenland
• Online Access: https://hal.science/hal-00292002

International audience 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.