欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
以Tenax-TA、Carboxen 1000和Carbosieve SⅢ为采样管填充料，将植物源挥发性有机物吸附于采样管内，样品通过二次热解吸仪解吸后，随载气进入气相色谱仪，采用氢火焰离子化检测器（FID）测定，建立了利用二次热解吸仪与气相色谱联用技术测定植物挥发性有机物的分析方法。载气N2流速为30mL/min，60℃下吹扫吸附管2min，然后在250℃下解吸吸附管5min，冷却1min后，在275℃下解吸聚焦管3min，样品经传输线进入气相色谱。气相色谱载气N2压力为190kPa，FID检测器温度280℃；进样口温度225℃；初始柱温40℃，停留5min，以2℃／min升温至120℃，保留1min，然后以20℃／min升温至200℃，保留10min。方法重现性好，精密度高，线性相关系数大于0．99；检出限均低于9×10^-9g／L；解吸效率大于96％，适用于植物源挥发性有机物的测定。
英文摘要：
A thermal desorption and gas chromatographic method for the analysis of biogenic volatile organic compounds （BVOCs） was established. The air samples were collected on glass adsorbent tubes filled with Tenax-TA, Carboxen 1000 and Carbosieve SⅢ. The sample was thermal desorbed, and then determined by gas chromatography with flame ionization detector. The pre-concentrated samples were dry at 60℃ for 2 min, and then thermally desorbed at 250 ℃ for 5 rain at 30 mL/min, and secondary desorption was at 275 ℃ for 3 min. A GC-FID was used to detect and. quantify BVOCs. An initial oven temperature of 40 ℃ was maintained for 5 min, and then increased to 120 ℃ at 2 ℃/min for 1 rain, followed by an increase at 20 ℃/min to 200 ℃ for 10 min. The results showed that eight kinds of BVOCs could be separated by the gas chromatographic condition, which had good precisions and high recoveries. The objective compounds can be calculated very accuracy by a standard curve individually （average r above 0.99）. The precision is lower than 5% and the minimum detectable quantity was 4 × 10^-10 g/L. The desorption efficiency was higher than 96%. The method provides a new way for intensifying the BVOCs.
同期刊论文项目
同项目期刊论文
Effects of Elevated Ozone on Photosynthetic CO2 Exchange
and Chlorophyll a Fluorescence in Leaves of
Influence of elevated carbon dioxide and ozone on the foliar nonvolatile terpenoids in Ginkgo biloba
Solar activity, Global Surface Air Temperature Anomaly and Pacific Decadal Oscillation signals obser
Impact of Elevated CO2 and O3 Concentrations on Biogenic
Volatile Organic Compounds Emissions from G
期刊信息
位置：