Conifer monoterpenes emitted to air by logging operations
1991; Taylor & Francis; Volume: 6; Issue: 1-4 Linguagem: Inglês
10.1080/02827589109382666
ISSN1651-1891
AutoresAnn‐Margret Strömvall, Göran Petersson,
Tópico(s)Biological Activity of Diterpenoids and Biflavonoids
ResumoAbstract Concentration levels in air were determined for monoterpenes emitted from forestry operations in south‐west Sweden. Field samples were collected on Tenax cartridges and analyzed in the laboratory by techniques based on gas chromatography. Processing of Scots pine as well as Norway spruce with a harvester gave rise to ∼ 1000 μg/m3 of total monoterpenes near the machine. The corresponding levels above fresh branch wood were 100–500 μg/m3. The background level was —1 μg/m3. The major monoterpenes were a‐pinene and 3‐carene from Pinus sylvestris and a‐pinene and ß‐pinene from Picea abies. Compounds constituting 1–10% each of the total monoterpenes were camphene, 3‐carene, limonene, ß‐phellandrene and myrcene for spruce and camphene, ß‐pinene, limonene, ß‐phellandrene, myrcene and terpinolene for pine. Representative percentual compositions for the two species are given for 13 monoterpenes. Photo‐oxidant formation from the monoterpenes is discussed with respect to potential local contributions to strain and damage on forests. Possible preventive measures are suggested. Key words: monoterpenesgas chromatographyambient airphoto‐oxidantsfinal fellingharvestinglimbingcross cuttingScots pineNorway spruceforest decline
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