Speciation analysis for mercury in gas condensates by capillary gas chromatography with inductively coupled plasma mass spectrometric detection.
A method allowing species-selective determination of atomic mercury, non-polar dialkylated mercury compounds,polar monoalkylated species and inorganic mercury complexes in natural gas condensates was developed. Inductively coupled plasma mass spectrometry was employed as a detection method for capillary gas chromatography and compared with microwave induced plasma atomic emission detection for the analysis of hydrocarbon-rich matrices. The method was based on two consecutive injections allowing comprehensive speciation analysis. First a sample aliquot was diluted with toluene and analysed for Hg0 and individual dialkylmercury compounds. Then, another aliquot was butylated with a Grignard reagent for the species specific determination of Hg(II) and monoalkylated mercury species. The detection limits were down to 0.08 pg level.
Bouyssiere
Brice
B
UMR 5034 CNRS, Hélioparc, 2 Avenue du President Angot, 64053 Pau, Cedex 9, France. brice.bouyssiere@univ-pau.fr
Baco
Franck
F
Savary
Laurent
L
Lobiñski
Ryszard
R
D002849:Chromatography, Gas / Q000379:methods*; D005740:Gases / Q000737:chemistry*; D008628:Mercury / Q000737:chemistry*
D005740:Gases; D008628:Mercury