新一代萃取分离技术──固相微萃取

A New Separation and Extraction Method-Solid-Phase Micro-Extraction

介绍了一种新型样品制备法——固相做萃取（SPME）的原理及其应用。与其它样品制备技术相比，SPME法具有操作时间短、样品量小、无需萃取溶剂、适于分析挥发性与非挥发性物质、重视性好等优点。

The principle and application of a new sample preparation method-solid-phase micro-extraction (SPME) are introduced in this paper. An SPME unit consists of a certain length of fused silica fiber coated with stationary phase, and a holder which looks like a microliter syringe. Organic analytes are adsorbed by the fiber, and is directly introduced into the GC injector, where the adsorbed analytes are desorbed. SPME can be used to concentrate volatile and nonvolatile compounds in both liquid and gaseous samples without the use of solvents and provides low detection limits. The technique is more favorable in comparing with other sample preparation methods.