Dynamic capillary diffusion system for monoterpene and sesquiterpene calibration : quantitative measurement and determination of physical properties

This article describes a method for preparation of low concentration gas standard mixtures of biogenic volatile organic compounds (BVOCs) emitted primarily by plants. A set of 10 plant volatiles including -pinene, -pinene, 3-carene, linalool, methyl salicylate, -cedrene, -caryophyllene, -farnesene, aromadendrene and -humulene was used in the study. Gas standard mixture of these compounds was generated using a capillary diffusion system (CDS). Diffusion coefficient (D) and saturation vapour pressure (p(s)) data of these compounds were calculated from experimentally determined gas chromatographic retention indices (RI) and empirical relationships between D and p(s) versus RI. A comparison of the calculated and measured concentrations of investigated compounds has proved that designed CDS can be successfully used for the proper quantification of BVOCs.

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