杉木挥发性有机物释放特征研究

为了明确杉木(Cunninghamia lanceolata)挥发性有机物(VOCs)的成分组成和含量的变化规律，采用动态顶空采集法和热脱附-气质联用(TDS-GC-MS)技术，对杉木释放的VOCs成分组成和相对含量的季节性变化进行分析。结果表明，杉木释放的VOCs中共鉴定出60种化合物，一年中释放的化合物种数随季节变化呈先升后降的趋势，夏季释放种类最多，达42种。检测到的烷烃类、醛类、酯类和醇类化合物种类最多，占检测到的化合物总种类数的73.33%。春季杉木释放的VOCs以醇类化合物为主，总相对含量为27.19%；夏季以萜烯类化合物为主，总相对含量为17.29%；秋季以醛类化合物为主，总相对含量为23.55%。综上，杉木具有一定的康养功效，夏季是在杉木林中进行康养活动的最佳时期。

Released Characteristics of Volatile Organic Compounds in Cunninghamia lanceolata

To clarify the composition and variation rules of contents of components of volatile organic compounds (VOCs) in Cunninghamia lanceolata, seasonal changes of composition and relative contents of components of VOCs released by C. lanceolata were compared and analyzed by using dynamic headspace air-circulation method and thermal desorption-gas chromatography-mass spectrum (TDS-GC-MS) technique. The results showed that total of 60 compounds were identified in the VOCs released by C. lanceolata. The number of compound types rose first and then decline in all year, and the number of compounds released in summer was the most abundant, reaching 42. The largest number of detected compound types consisted of alkanes, aldehydes, esters, and alcohols, accounting for 73.33% of all types of detected compounds. Compound types of C. lanceolata VOCs released in Spring were mainly alcohols, with the total relative content of 27.19%, terpenes in Summer, with the total relative content of 17.29%, and aldehydes in Autumn, with the total relative content of 23.55%. In summary, C. lanceolata has a certain intensive effect on health care, and summer is the best time for forest recreation in C. lanceolata forest.