摘要
采用自动热脱附（ATD）和气相色谱质谱（GC/MS）联用技术,研究并建立了空气中11种萜烯有机物的测试方法。采用吸附剂Tenax TA进行吸附捕集时,α-蒎烯、莰烯、β-蒎烯极易发生穿透现象,三者的穿透率超过60%;与Tenax TA相比,吸附剂Carbopack B/CarbosieveTMS-Ⅲ可有效抑制萜烯有机物的穿透行为。ATD优化的操作参数为：一级脱附温度和时间分别选择为260℃和10 min,冷肼温度为-20℃,二级热脱附温度和时间分别为280℃和5 min。该方法测试结果准确,重现性和稳定性较好,方法的加标回收率为89%~112%,相对标准偏差（RSD）小于11%。将该法用于室内空气中萜烯类有机物的测试,发现不同空气样品中均含有多种萜烯有机物,其总量约占总挥发性有机物（TVOC）的15%~65%,出现几率较大的有α-蒎烯、β-蒎烯、香叶烯、蒈烯、柠檬烯和柏木烯,松油醇较少出现。
This paper described a study for determination of terpene compounds in air with instruments of auto thermal desorption（ATD）,GC/MS,and the common adsorbents Tenax TA and CarbosieveTMS-Ⅲ used to trap terpene compounds.Results of the study revealed the optimum parameters of ATD with regard to the first and the second desorption temperature and desorption time;the average recovery ranged from 89 to 112 percent and relative deviation（RSD） was less than 11%,which indicated a good repeatability and stability of the method.Besides,using the above method to detect VOCs in indoor air found that various kinds of terpene compounds existing,most of which were α-pinene,β-pinene,β-myrcene,3-carene,limounen and cedrene with the exception of α-terpene.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2013年第3期160-164,共5页
Environmental Science & Technology
基金
国家质检总局科研专项经费项目(2012IK040)
关键词
热脱附
气相色谱质谱
萜烯
吸附剂
auto desorption
gas chromatography/mass spectrometry
terpene
adsorption
