用于测定有机氯农药的湍流固液萃取方法的比较研究
Comparative study of turbulent solid-liquid extraction methods for the determination of organochlorine pesticides.
作者信息
Bandoniene Donata, Gfrerer Marion, Lankmayr Ernst P
机构信息
Graz University of Technology, Institute for Analytical Chemistry, Micro- and Radiochemistry, Technikerstr. 4, 8010 Graz, Austria.
出版信息
J Biochem Biophys Methods. 2004 Oct 29;61(1-2):143-53. doi: 10.1016/j.jbbm.2004.02.007.
The aim of any extraction method in analytical chemistry is to effectively separate the analytes from the matrix with minimal solvent and time required. In this study, a comparison of the classical Soxhlet extraction and some new turbulent solid-liquid extraction techniques, such as fluidized-bed extraction (FBE), modified dive-in fluidized-bed extraction (dive-in FBE), modified dive-in Soxhlet extraction (dive-in SE) and dive-in thimble extraction (dive-in TE) for the determination of organochlorine pesticides (OCPs) was carried out. The turbulent extraction methods were performed by using the fexIKA vario control series extractor and by modification of the extraction system to dive-in technique, respectively. In addition, FBE and dive-in FBE were operated under the same, only for the FBE system established, optimum conditions. For the determination of the analytes a selective clean-up of the extracts followed by a gas chromatography (GC) method with mass spectrometric detection was used. All advanced extraction methods with reduced time and solvent consumption exhibited higher extraction efficiency than the standard procedure, Soxhlet extraction.
分析化学中任何萃取方法的目的都是以最少的溶剂用量和最短的时间将分析物与基质有效分离。本研究对经典索氏萃取法与一些新型湍动固液萃取技术进行了比较，这些新型技术包括流化床萃取（FBE）、改进的浸入式流化床萃取（浸入式FBE）、改进的浸入式索氏萃取（浸入式SE）和浸入式顶针萃取（浸入式TE），用于测定有机氯农药（OCPs）。湍动萃取方法分别使用fexIKA vario control系列萃取器并通过将萃取系统改进为浸入式技术来进行。此外，FBE和浸入式FBE在相同条件下运行，且仅针对已建立的FBE系统的最佳条件。对于分析物的测定，采用了对提取物进行选择性净化，随后采用气相色谱（GC）-质谱检测法。所有时间和溶剂消耗减少的先进萃取方法都比标准方法索氏萃取具有更高的萃取效率。
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