Solid phase microextraction/isothermal GC for rapid analysis of complex organic samples
Solid phase microextraction/isothermal GC for rapid analysis of complex organic samples
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DOI：
10.1002/jhrc.1240180305
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发表时间：
1995-03
期刊：
影响因子：
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通讯作者：
T. Górecki;J. Pawliszyn
中科院分区：
文献类型：
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作者：
T. Górecki;J. Pawliszyn
采用固相微萃取（SPME）作为高速等温气相色谱的进样技术。设计并制造了一台专用于固相微萃取光纤注入的注入器。注射器以连续加热和快速加热两种模式操作。后一种模式被证明是更好的高速分离。该进样器用于苯系物的进样分离。当用具有56 μm厚的聚（二甲基硅氧烷）涂层的纤维直接从水中取样时，BTEX组分在约100 ℃的等温条件下分离。18秒。具有较薄涂层（15 μm）的光纤使得分离能够在约100 μ m内完成。从顶空取样时为12 s。在这两种情况下，结果具有高度重现性，如通过相对标准偏差的估计值所测量的。
Solid phase microextraction (SPME) was used as the sample introduction technique for high-speed isothermal GC. An injector dedicated for SPME fiber injection was designed and built. The injector was operated in two modes, continuously heated and flash heated. The latter mode proved to be better for high-speed separations. The injector was then used for sample introduction in separation of BTEX. When sampling directly from water with a fiber having a 56 μm thick poly(dimethylsiloxane) coating, the BTEX components were separated under isothermal conditions in ca. 18 s. A fiber with a thinner coating (15 μm) enabled the separation to be completed in ca. 12 s when sampling from headspace. In both cases the results were highly reproducible, as measured by the estimated values of the relative standard deviation.