| Summary: | 碩士 === 國立高雄師範大學 === 化學系 === 91 === Headspace sorptive techniques namely water-bath headspace solid-phase microextraction (WB-HSSPME), microwave-assisted headspace solid-phase microextraction (MA-HSSPME), water-bath headspace stir bar sorptive extraction (WB-HSSBSE), microwave-assisted headspace stir bar sorptive extraction (MA-HSSBSE) were developed and studied for the simultaneous extraction/enrichment of ordor compounds, 2-methylisoborneol (2-MIB) and geosmin(GSM), in the drinking water samples prior to the quantification by gas chromatograph-mass spectrometer (GC-MS). The odor compounds in aqueous media were extracted onto a solid-phase micro fibre or stir bar sorptive material via the headspace with the aid of microwave-assisted or water-bath heating. The optimum conditions for obtaining extraction efficiency, such as extraction time, extraction temperature, addition of salt, sorbent material, and the desorption parameters were investigated. Experimental results indicat that the optimized MA-HSSPME technique is 75min at 75℃ with 25 % NaCl addition to give 20.1% and 53.1 % recoveries of 2-MIB and GSM, respectively; whereas the optimized WB-HSSPME technique is 75min at 75℃ with 20 % NaCl addition to give 17.4 % and 61.36 % recoveries of 2-MIB and GSM, respectively. The interface area between aqueous and gas phases did not provide significant difference in the extraction efficiency. The correlation coefficients for the linear dynamic range from 0.5 to 250 ng/l exceeded 0.99 for the both techniques. Samples collected from drinking water treatment plant were also determined by the proposed methods
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