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Dive into the research topics where Hua Lei is active.

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Featured researches published by Hua Lei.


CHINESE JOURNAL OF ANALYTICAL CHEMISTRY | 2013

Single Photon Ionization/Photoelectron Ionization-Membrane Introduction Mass Spectrometry for On-line Analysis Ethers Gasoline Additive in Water

Li Fanglong; Hou Ke-Yong; Chen Wendong; Chen Ping; Zhao Wuduo; Cui Huapeng; Hua Lei; Xie Yuanyuan; Pei Ke-Mei; Li Haiyang

A magnetic field enhanced photoelectron ionization (MEPEI) source combined with single photon ionization (SPI) for membrane inlet time-of-flight mass spectrometry was used for on-line detection of ether gasoline additive. Methyl tert-butyl ether (MTBE), ethyl tert-butyl ether (ETBE), methyl tert-amyl ether (TAME) and isopropyl ether (DIPE) were selected as the typical pollutants. A membrane inlet was used to transfer the analytes from liquid into gas phase in an on-line manner by pervaporization without sample pretreatment. Less sample fragments were in SPI, and molecular ions could be used to quick preliminarily qualitative analysis; high energy electrons and fragmentations produced by MEPEI can be used to accurate qualitative isomers and overcame the problem of resolution of overlapping peaks in complex matrix when using direct injection. Under the optimal conditions such as membrane temperature 60 degrees C, membrane thicknesses 50 mu m and membrane areas 160 cm(2), the single sample analysis time was less than 100 s, and the limits of detection for MTBE, ETBE, TAME and DIPE were 5.5, 4.8, 3.3 and 4.3 mu g/L, respectively. The instrument has been successfully applied to rapid analysis of MTBE in simulated water by gasoline.


Archive | 2014

Composite ionization source of vacuum ultraviolet photoionization and chemical ionization used in mass spectrometry

Li Haiyang; Hua Lei; Wu Qing-Hao; Cui Huapeng; Hou Keyong


Archive | 2013

Solid phase and liquid phase compound dynamic gas preparation device and gas preparation method

Li Haiyang; Xie Yuanyuan; Hua Lei; Hou Keyong; Cui Huapeng; Chen Ping


Archive | 2014

Flat type differential ion mobility spectrometer capable of selectively detecting positive and negative ions

Wang Weiguo; Li Haiyang; Hua Lei; Li Yang; Cheng Shasha


Archive | 2014

Mass spectrum vacuum ultraviolet ionization source based on optical-window-free gas discharge lamp

Hua Lei; Li Haiyang; Hou Keyong; Xie Yuanyuan; Jiang Lei


Archive | 2013

Mass spectrum VUV (Vacuum Ultraviolet) photoionization source device for in-source collision induced dissociation

Li Haiyang; Hua Lei; Wu Qing-Hao; Cui Huapeng; Chen Ping


Archive | 2013

Device for mass flow air enrichment analysis mass spectrum sampling in confined space

Li Haiyang; Cui Huapeng; Hou Keyong; Hua Lei; Chen Ping


Archive | 2013

Solid sample rapid thermal desorption mass spectrometry sampling device

Li Haiyang; Cui Huapeng; Hou Keyong; Hua Lei; Chen Ping


Archive | 2015

Online analysis system and method for continuous monitoring of catalysis of ammonia synthesis reaction

Li Haiyang; Xie Yuanyuan; Hua Lei; Hou Keyong; Chen Ping; Zhao Wuduo


Archive | 2015

Complete organic and inorganic explosive analyser

Li Haiyang; Chen Wendong; Hou Keyong; Xie Yuanyuan; Zhao Wuduo; Hua Lei

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Wang Weiguo

Dalian Institute of Chemical Physics

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Cheng Shasha

Dalian Institute of Chemical Physics

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Su Mingyang

Chinese Academy of Sciences

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Li Jinghua

Dalian Institute of Chemical Physics

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Li Jinxu

Chinese Academy of Sciences

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