Journal
JOURNAL OF ATMOSPHERIC CHEMISTRY
Volume 50, Issue 3, Pages 263-278Publisher
SPRINGER
DOI: 10.1007/s10874-005-5078-6
Keywords
needle litter; terpenes; emission; extractable compounds; HS-SPME; distribution coefficients; calculation
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A combination of solid-phase microextraction (SPME) and gas chromatography can be successfully used both for establishing the qualitative composition of volatile organic compounds (VOC) emitted by leaf litter and for determining their emission rates. Taking as an example European larch litter, it is shown that dead plant material contains considerable amounts of volatile components as well as non-volatile compounds that can be VOC precursors formed as a result of enzymatic reactions. It is proposed to include the determination of extractable compounds into the methodology of studying litter as a source of atmospheric VOC. Some data on litter mass are reported and it is concluded that this data may be included into special models for emission evaluation. In this work the distribution coefficients of monoterpene hydrocarbons between the gas phase and polydimethylsiloxane fiber coating necessary for quantitative determinations in SPME were estimated.
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