多相催化反应的在线光谱-质谱探测系统  

On line Spectral and Mass Detection System for Heterogeneous Catalysis

作　　者：谢彦[1] 王丙星[1,2] 王利[1] 白吉玲[1] 

机构地区：[1]中国科学院大连化学物理研究所,分子反应动力学国家重点实验室 [2]哈尔滨师范大学化学系,哈尔滨150080

出　　处：《分析化学》2004年第11期1556-1559,共4页Chinese Journal of Analytical Chemistry

基　　金：中国科学院知识创新资助课题 (No .KGCX2 2 0 1 3 )

摘　　要：在研究多相催化反应中 ,建立和发展了一套在线高灵敏的共振增强多光子电离 飞行时间质谱检测系统。采用光纤作为传输介质 ,消除了激光在电离池内的吸收 ;自制了高输入阻抗的电荷灵敏放大器 ,提高了信号的稳定性 ;改进了飞行时间质谱仪中脉冲阀的进气方式 ,减少了死区 ,实现了质谱的快速采样。实验结果证明与传统的催化检测仪器相比 ,本系统具有灵敏度和采样率高 ,在线实时检测等特点。A high sensitive on-line detection system for heterogeneous catalysis was built and developed, in which both of the resonance-enhanced multi-photon ionization and time-of-flight mass spectroscopy (TOF-MS) were used. the optical fiber was adopted to transmit laser and eliminate the laser adsorption in ionization chamber; the home-made high input impedance circuit was applied to improve the signal stability; fast sampling was carried out by changing gas inlet of TOF-MS to reduce the dead volume of pulse valve. The results indicates this system has higher sensitivity and sampling frequency than traditional detection apparatus for heterogeneous catalysis.

关 键 词：多相催化反应 在线光谱-质谱 运算放大器 共振增强多光子电离 飞行时间质谱 气相色谱 催化剂 四极质谱 

分 类 号：O657.63[理学—分析化学]