| 新型单光子电离和光电子电离复合电离源的研究及应用 |
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| 引用本文： | 吴庆浩,花磊,侯可勇,崔华鹏,陈平,赵无垛,王卫国,李京华,李海洋.新型单光子电离和光电子电离复合电离源的研究及应用[J].分析化学,2011(10):1465-1469. |
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| 作者姓名： | 吴庆浩 花磊 侯可勇 崔华鹏 陈平 赵无垛 王卫国 李京华 李海洋 |
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| 作者单位： | 中国科学院大连化学物理研究所;中国科学院研究生院; |
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| 基金项目： | 国家自然科学基金(Nos.20877074,B070102)资助项目 |
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| 摘 要： | 复合电离源在单光子电离模式下可以产生分子离子信号,易于确定分子量；在光电子电离模式下,70 eV电子能量可以产生含有物质结构信息的碎片峰,实现物质的结构鉴定.两种电离模式可以实现毫秒级迅速切换.本研究通过提高光程降低了单光子电离模式下的检出限.在单光子电离模式下,对苯的检出限为50 μg/m3(累加时间为4s)；光电子...
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| 关 键 词： | 复合电离源 单光子电离 光电子电离 在线监测质谱 |
Characterization and Applications of Combined Single Photon Ionization and Photoelectron Ionization Source |
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| WU Qing-Hao,HUA Lei,HOU Ke-Yong,CUI Hua-Peng,CHEN Ping,ZHAO Wu-Duo,WANG Wei-Guo,LI Jing-Hua,LI Hai-Yang.Characterization and Applications of Combined Single Photon Ionization and Photoelectron Ionization Source[J].Chinese Journal of Analytical Chemistry,2011(10):1465-1469. |
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| Authors: | WU Qing-Hao HUA Lei HOU Ke-Yong CUI Hua-Peng CHEN Ping ZHAO Wu-Duo WANG Wei-Guo LI Jing-Hua LI Hai-Yang |
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| Institution: | WU Qing-Hao1,2,HUA Lei1,HOU Ke-Yong1,CUI Hua-Peng1,CHEN Ping1,ZHAO Wu-Duo1,WANG Wei-Guo1,LI Jing-Hua1,LI Hai-Yang 1 1(Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023) 2(Graduate School of Chinese Academy of Sciences,Beijing 100039) |
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| Abstract: | The characters and applications of combined single photon ionization(SPI) and photoelectron ionization(PEI) source were introduced.The ion source can generate dominated molecular ions in SPI mode and fragments ions same as standard EI spectrum in PEI mode.The switch time between the two modes was several microseconds.The limit of detection in SPI mode was reduced by increasing the optical path in the ion source.Achieved detection limits were 0.05 mL/m3 and 20 mL/m3 for benzene in SPI mode and SO2 in PEI mod... |
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| Keywords: | Combined ion source Single photon ionization Photoelectron ionization Online monitoring mass spectrometry |
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