COMPLEMENTARY USE OF CAPILLARY GAS-CHROMATOGRAPHY MASS-SPECTROMETRY (ION-TRAP) AND GAS-CHROMATOGRAPHY INDUCTIVELY-COUPLED PLASMA-MASS SPECTROMETRY FOR THE SPECIATION OF VOLATILE ANTIMONY, TIN AND BISMUTH COMPOUNDS IN LANDFILL AND FERMENTATION GASES
J. Feldmann et al., COMPLEMENTARY USE OF CAPILLARY GAS-CHROMATOGRAPHY MASS-SPECTROMETRY (ION-TRAP) AND GAS-CHROMATOGRAPHY INDUCTIVELY-COUPLED PLASMA-MASS SPECTROMETRY FOR THE SPECIATION OF VOLATILE ANTIMONY, TIN AND BISMUTH COMPOUNDS IN LANDFILL AND FERMENTATION GASES, Analyst, 123(5), 1998, pp. 815-820
ICP-MS is very sensitive and has limited matrix effects when used as a
n element-specific detector for GC in order to identify volatile metal
or metalloid species, GC-MS is not very sensitive or selective in the
electron ionization (EI) mode, but provides molecular information abo
ut volatile species. In this work, an ion trap EI-MS-MS and an ICP-MS
system were used as two different detectors for the same GC system to
provide complementary information about volatile organometallic specie
s in the complex matrices of landfill and sewage sludge fermentation g
ases. A simple robust GC separation method with cryotrapping was adequ
ate for the separation of the different metal(loid) containing volatil
e compounds, and was directly coupled to the ICP-MS system, In additio
n, gas samples from this GC system were collected in evacuated vials.
These fractions were further separated on a capillary column and detec
ted in an ion trap mass spectrometer. For the first time, parent ions,
fragmentation patterns, isotopic ratios for Sb and Sn, and MS-MS data
were used to identify positively Me3Sb, Me4Sn and Et2Me2Sn in landfil
l gas and Me3Sb and Me3Bi in fermentation gas.