New Strategy for Further Improving the Detection Sensitivity of Direct Analysis in Real Time-Mass Spectrometry

作     者：Ze Li Jialing Zhang Yiwei Zhang Yu Bai Huwei Liu 

作者机构：Institute of Analytical ChemistryCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China State Key Laboratory of Petroleum Pollution ControlCNPC Research Institute of Safety and Environmental TechnologyBeijing 102206China 

出 版 物：《Journal of Analysis and Testing》 (分析检测（英文）)

年 卷 期：2017年第1卷第1期

页      面：17-22页

学科分类：0202[经济学-应用经济学] 02[经济学] 020205[经济学-产业经济学] 

基　　金：This work was financially supported by the National Natural Science Foundation of China(Grant Nos.21275012 and 21175008) 

主　　题：Ambient mass spectrometry Direct analysis in real time-mass spectrometry Ion focusing Sensitivity 

摘      要：Ambient mass spectrometry facilitates surface detection under ambient conditions and has quickly found its applications in various ***,the sensitivity of AMS methods is usually not as good as that of encapsulated ion sources due to less efficient ion *** this work,a briefly machined external ion funnel(threepole electrostatic lens)was adopted and installed between direct analysis in real time and the mass spectrometer inlet to increase detection *** investigation with SIMION version 8.0 was employed to calculate electric fields and to simulate the trajectories of charged particles in the electric *** the geometrical parameters of the ion funnel and the electric parameters were studied to obtain the optimal ion focusing results,which demonstrated the ion funnel equipment would greatly improve the ion transmission *** equipment showed good prospect in direct analysis in real time-mass spectrometry analysis in the future.