Gas chromatographic vapor pressure determination of atmospherically relevant oxidation products of 尾-caryophyllene and 伪-pinene
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- 作者：Kari Hartonen ; Jevgeni Parshintsev ; Vesa-Pekka Vilja ; Heidi Tiala ; Sinivuokko Knuuti ; Ching Kwan Lai ; Marja-Liisa Riekkola
- 关键词：Vapor pressure ; Gas chromatography ; 尾-Caryophyllene aldehydes ; Pinonaldehyde ; Pinic acid ; cis-pinonic acid
- 刊名：Atmospheric Environment
- 出版年：December, 2013
- 年：2013
- 卷：81
- 期：Complete
- 页码：330-338
- 全文大小：508 K
文摘
Vapor pressures (subcooled liquid, pliquid) of atmospherically relevant oxidation products of 尾-caryophyllene (尾-caryophyllene aldehyde 0.18聽卤聽0.03聽Pa and 尾-nocaryophyllene aldehyde 0.17聽卤聽0.03聽Pa), and 伪-pinene (pinonaldehyde 16.8聽卤聽0.20聽Pa, cis-pinic acid 0.12聽卤聽0.06聽Pa, and cis-pinonic acid 0.99聽卤聽0.19聽Pa) at 298聽K were obtained by gas chromatography with flame ionization detection (FID) and mass spectrometric (MS) detection. The effects of stationary phase polarity and column film thickness on the vapor pressure values were investigated. Increase in stationary phase polarity provided smaller values, while increase in film thickness gave slightly higher values. Values for vapor pressure were at least two orders of magnitude lower when obtained by a method utilizing vaporization enthalpy (determined by gas chromatography-mass spectrometry) than by retention index method. Finally, the results were compared with values calculated by group contribution theory. For the 尾-caryophyllene oxidation products, the values measured by gas chromatography were slightly lower than those obtained by theoretical calculations. The opposite trend was observed for the 伪-pinene oxidation products. The methods based on gas chromatography are concluded to be highly useful for the determination of vapor pressures of semi-volatile compounds. Except for the most polar pinic and pinonic acids, differences between vapor pressure values obtained by GC-FID and GC-MS were small. Since GC-MS provides structural information simultaneously, the use of GC-MS is recommended.