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While trapping sorbents have been used for many years in headspace analysis (most commonly with gas chromatography), the modern techniques of solid phase microanalysis (SPME) are particularly applicable to survey analyses [1]. In the following tables, we provide information for the selection and application of the various fibers, modifications to fiber materials and data on salting out reagents [1-5]. For information on other trapping sorbents, chelating agents, resins and polymeric phases used for headspace analysis, please consult reference 1.