Measurement of enantiomer percentages for five monoterpenes from six conifer species by cartridge-tube-based passive sampling adsorption–thermal desorption (ps-ATD)

Abstract. Many monoterpenes have at least two different stereochemical forms, and many biosynthetic pathways are known to favor one product over the other(s). A rapid method was developed used in determination of (-/+)-enantiomeric distributions for ?-pinene, ?-pinene, camphene, limonene, ?-phellandrene as emitted by plant material from six conifer species. The species included pine Pseudotsuga menziesii Pinus ponderosa, well four cypress Chamaecyparis lawsoniana, Thuja plilcata, Juniperus chinensis, occidentalis. involved passive sampling adsorption–thermal desorption (ps-ATD). During sampling, cartridge tube placed a 60 mL glass vial with 1 h. Sample analytes were thermally transferred chiral gas chromatography (GC) column. Detection mass spectrometry (MS). exhibited emission patterns five -/+ totals, although within given among similar across multiple plants. ?-pinene dominated P. ?-pinene T. plicata separations revealed differences enantiomeric (?)-enantiomers strongly ponderosa; (?)-enantiomer C. lawsoniana. dependence precision on percent enantiomer abundance is discussed.