Comprehensive evaluation of volatile organic compounds emitted from akamatsu (Pinus densiflora) by chemical analysis and OH reactivity measurements
| Autor: | Shibata, Miho, Fujii, Tomihide, Kishimoto, Iori, Tsurumaru, Hiroshi, Sakamoto, Yousuke, Kajii, Yoshizumi |
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| Jazyk: | japonština |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | ELCAS Journal. 1:76-80 |
| Popis: | Volatile organic compounds (VOCs) emitted from Akamatsu (Pinus densiflora) or Japanese red pine, the predominant conifer species found in Japan, were measured by gas chromatography with flame ionization detection (GC-FID). Eleven chromatographic peaks were obtained and assigned by standard samples except the biggest peak called X1. Based on various considerations, X1 was assigned as the peak of β-phellandrene. The total OH reactivity was also measured by a laser flash pump-probe technique at the same time as the GC analysis. The experiments were performed under a daily cycle simulated by controlling temperature and light intensity. A comparison between the expected OH reactivity calculated from the GC measurements and the measured OH reactivity revealed the existence of undetermined VOCs accounting for about 40% of the total OH reactivity. The unaccounted- for reactivity did not show any positive correlation with predominant monoterpenes detected from Akamatsu. 我国の優勢樹種であるアカマツから放出されるVOC濃度をGC-FIDにより測定した。11のピークのうちの未同定であったX1をβ-phellandreneと同定した。VOC測定と同時にレーザー分光法による総OH反応性を測定した。温度および光強度を制御して日サイクルを模擬的に作り出しVOCおよびOH反応性を測定した。個々のVOC測定から導かれる総OH反応性の計算値とレーザーにより実測される値の比較を行った。その結果、４割の未知VOCの存在が明らかとなった。未知VOCは観測されたいずれのモノテルペン類とも相関が低かった。 地球環境学堂 大気環境科学 |
| Databáze: | OpenAIRE |
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