Department of Applied Chemistry, University of Yamanashi, 4-3-11 Takeda, Kofu 400-8511, Japan.
Anal Chim Acta. 2012 Oct 9;746:77-83. doi: 10.1016/j.aca.2012.08.014. Epub 2012 Aug 23.
A novel needle-type sample preparation device was developed for the effective preconcentration of volatile organic compounds (VOCs) in indoor air before gas chromatography-mass spectrometry (GC-MS) analysis. To develop a device for extracting a wide range of VOCs typically found in indoor air, several types of particulate sorbents were tested as the extraction medium in the needle-type extraction device. To determine the content of these VOCs, air samples were collected for 30min with the packed sorbent(s) in the extraction needle, and the extracted VOCs were thermally desorbed in a GC injection port by the direct insertion of the needle. A double-bed sorbent consisting of a needle packed with divinylbenzene and activated carbon particles exhibited excellent extraction and desorption performance and adequate extraction capacity for all the investigated VOCs. The results also clearly demonstrated that the proposed sample preparation method is a more rapid, simpler extraction/desorption technique than traditional sample preparation methods.
一种新型的针型样品制备装置被开发出来，用于在气相色谱-质谱联用（GC-MS）分析之前对室内空气中的挥发性有机化合物（VOCs）进行有效的预浓缩。为了开发一种能够提取室内空气中常见的多种 VOCs 的装置，我们测试了几种类型的颗粒状吸附剂作为针型提取装置中的提取介质。为了确定这些 VOCs 的含量，将装有填充吸附剂的提取针在空气中采集 30 分钟，然后通过直接插入针将提取的 VOCs 在 GC 进样口进行热解吸。由填充有二乙烯基苯和活性炭颗粒的针组成的双床吸附剂表现出优异的提取和解吸性能，并且对所有研究的 VOCs 都具有足够的提取容量。结果还清楚地表明，与传统的样品制备方法相比，所提出的样品制备方法是一种更快速、更简单的提取/解吸技术。
