微波輔助頂空固相微萃取方法分析水樣品中半揮發性物質之研究

• Main Authors: Huang Ya Ping, 黃雅苹
• Other Authors: 徐永源
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/72367520785796444471

碩士 === 國立高雄師範大學 === 化學系 === 92 === The pretreatment technique of microwave-assisted headspace solid-phase microextraction (MA-HS-SPME) has been developed and studied for the extraction of semi-volatile compounds in aqueous samples prior to the chromatographic analysis. The optimum conditions for obtaining extraction efficiency, such as the extraction time , extraction temperature, addition of salts, and the ratio of sample to headspace volume parameters were investigated. Experimental results indicated that the proposed MA-HS-SPME technique attained the best extraction efficiency under the optimized conditions, i.e., irradiation of extraction solution (20 ml aqueous sample in 40 ml headspace vial with no addition of salt) under 30W microwave power for 30 min at 70℃.The detection was linear at 1-250 ng/l with correlation coefficient exceeded 0.997 . The detection limit obtained were between 0.8-10.7 ng/l, repeatabilities range from 0.4 to 14.3 %. Water samples collected from a river, and from the tap were analysed using the optimised conditions.