Larroque Virginie, Desauziers Valérie, Mocho Pierre
Laboratoire Génie de l'Environment Industriel, France.
J Chromatogr A. 2006 Aug 18;1124(1-2):106-11. doi: 10.1016/j.chroma.2006.05.043.
Solid-phase microextraction (SPME) was applied to the on-site analysis of volatile organic compounds (VOCs) in indoor air. The compounds were at trace levels, which complicates analysis and also sample storage. Fibre storage before and after sampling was studied. Several tests were performed, and the best results were obtained for a home-made storage assembly. To avoid contamination by acetone and acetaldehyde, activated carbon was added in the storage housing. Under these conditions, fibres can be stored up to 2 days before use. After sampling, storage of 10 VOCs was evaluated by varying air relative humidity of the air. This parameter was shown to be insignificant for 3 storage days: recoveries for acetaldehyde and acetone were 149 and 176%, respectively, and ranged from 95 to 107% for the other VOCs investigated.
固相微萃取（SPME）被应用于室内空气中挥发性有机化合物（VOCs）的现场分析。这些化合物处于痕量水平，这使得分析以及样品储存都变得复杂。研究了采样前后纤维的储存情况。进行了多项测试，对于自制的储存组件获得了最佳结果。为避免丙酮和乙醛的污染，在储存外壳中添加了活性炭。在这些条件下，纤维在使用前可储存长达2天。采样后，通过改变空气相对湿度对10种挥发性有机化合物的储存情况进行了评估。结果表明，在3天的储存期内该参数影响不显著：乙醛和丙酮的回收率分别为149%和176%，其他所研究的挥发性有机化合物的回收率在95%至107%之间。
