Handbook Of Solid Phase Microextraction Pdf Creator

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Solid-phase microextraction sampling Solid-phase microextraction, or SPME, is a sampling technique that involves the use of a fiber coated with an extracting phase, that can be a liquid () or a solid (), which extracts different kinds of (including both and non-volatile) from different kinds of media, that can be in liquid or gas phase. The quantity of analyte extracted by the fibre is proportional to its concentration in the sample as long as is reached or, in case of short time pre-equilibrium, with help of or agitation. Contents • • • • Analysis [ ] After extraction, the SPME fiber is transferred to the injection port of separating instruments, such as a and, where of the analyte takes place and analysis is carried out. Advantages [ ] The attraction of SPME is that the extraction is fast, simple, can be done usually without solvents, and detection limits can reach parts per trillion (ppt) levels for certain compounds. SPME also has great potential for field applications; on-site sampling can be done even by nonscientists without the need to have gas chromatography-mass spectrometry equipment at each location. When properly stored, samples can be analyzed days later in the laboratory without significant loss of volatiles. [ ] References [ ].