Interference-free determination of selenium(IV) by capillary gas chromatography–microwave-induced plasma atomic emission spectrometry after volatilization with sodium tetraethylborate

1995 ◽  
Vol 10 (2) ◽  
pp. 111-115 ◽  
Author(s):  
M. Beatriz de la Calle Guntiñas ◽  
Ryszard Łobiński ◽  
Freddy C. Adams
Keyword(s):  
Gas Chromatography ◽  
Capillary Gas Chromatography ◽  
Atomic Emission ◽  
Atomic Emission Spectrometry ◽  
Emission Spectrometry ◽  
Plasma Atomic Emission ◽  
Plasma Atomic Emission Spectrometry ◽  
Microwave Induced Plasma ◽  
Sodium Tetraethylborate

Speciation Analysis of Organolead Compounds in Wine by Capillary Gas Chromatography/Microwave-Induced-Plasma Atomic Emission Spectrometry

1993 ◽  
Vol 76 (6) ◽  
pp. 1262-1267 ◽  
Author(s):  
Ryszard Lobinski ◽  
Joanna Szpunar-Lobinska ◽  
Freddy C. Adams ◽  
Pierre-Louis Teissedre ◽  
Jean-Claude Cabanis
Keyword(s):  
Gas Chromatography ◽  
Capillary Gas Chromatography ◽  
Speciation Analysis ◽  
Atomic Emission ◽  
Atomic Emission Spectrometry ◽  
Emission Spectrometry ◽  
Plasma Atomic Emission ◽  
Plasma Atomic Emission Spectrometry ◽  
Microwave Induced Plasma ◽  
Organolead Compounds

Abstract A method was developed for the speciation analysis of ionic organolead compounds in wine. The analytes were extracted as diethyldithiocarbamate complexes into hexane and propylated with a Grignard reagent. The derivatized extract was analyzed by capillary gas chromatography/microwave-induced-plasma atomic emission spectrometry. The method of standard additions was used for calibration to correct for variable recoveries and signal en hancements. Red, rosé, and white wines from southern France were analyzed. Trimethyllead was the ubiquitous species. The wines made from grapes grown close to industrial zones showed elevated concentrations of ethyllead species. The con centrations of methyllead and ethyllead found in wines were compared with the concentrations of organolead found in rain water and plant sap collected in the viticultural regions. The ratio of methyllead to ethyllead in wines greatly exceeded the same ratio found in atmospheric deposits.

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