Development of portable single photon ionization time-of-flight mass spectrometer combined with membrane inlet

2013 ◽  
Vol 334 ◽  
pp. 8-12 ◽  
Author(s):  
Wei Gao ◽  
Guobin Tan ◽  
Yi Hong ◽  
Mei Li ◽  
Huiqing Nian ◽  
...  
Keyword(s):  
Mass Spectrometer ◽  
Single Photon ◽  
Time Of Flight ◽  
Ionization Time ◽  
Single Photon Ionization ◽  
Flight Mass Spectrometer ◽  
Photon Ionization

Vacuum Ultraviolet Single-Photon Ionization Time-of-Flight Mass Spectrometer

2011 ◽  
Vol 39 (10) ◽  
pp. 1470-1475 ◽  
Author(s):  
Guo-Bin TAN ◽  
Wei GAO ◽  
Zheng-Xu HUANG ◽  
Yi HONG ◽  
Zhong FU ◽  
...  
Keyword(s):  
Mass Spectrometer ◽  
Vacuum Ultraviolet ◽  
Single Photon ◽  
Time Of Flight ◽  
Ionization Time ◽  
Single Photon Ionization ◽  
Flight Mass Spectrometer ◽  
Photon Ionization

scholarly journals Development of a Portable Single Photon Ionization-Photoelectron Ionization Time-of-Flight Mass Spectrometer

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Yunguang Huang ◽  
Jinxu Li ◽  
Bin Tang ◽  
Liping Zhu ◽  
Keyong Hou ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Mass Spectrometer ◽  
Single Photon ◽  
Time Of Flight ◽  
Single Photon Ionization ◽  
Flight Mass Spectrometer ◽  
Limit Of Quantitation ◽  
Volatile Organic ◽  
Photon Ionization

A vacuum ultraviolet lamp based single photon ionization- (SPI-) photoelectron ionization (PEI) portable reflecting time-of-flight mass spectrometer (TOFMS) was designed for online monitoring gas samples. It has a dual mode ionization source: SPI for analyte with ionization energy (IE) below 10.6 eV and PEI for IE higher than 10.6 eV. Two kinds of sampling inlets, a capillary inlet and a membrane inlet, are utilized for high concentration and trace volatile organic compounds, respectively. A mass resolution of 1100 atm/z64 has been obtained with a total size of 40 × 31 × 29 cm, the weight is 27 kg, and the power consumption is only 70 W. A mixture of benzene, toluene, and xylene (BTX), SO2, and discharging products of SF6were used to test its performance, and the result showed that the limit of quantitation for BTX is as low as 5 ppbv (S/N= 10 : 1) with linear dynamic ranges greater than four orders of magnitude. The portable TOFMS was also evaluated by analyzing volatile organic compounds from wine and decomposition products of SF6inside of a gas-insulated switchgear.

scholarly journals VOC Monitoring and Ozone Generation Potential Analysis Based on a Single-Photon Ionization Time-of-Flight Mass Spectrometer

Photonics ◽  
2020 ◽  
Vol 7 (3) ◽  
pp. 61
Author(s):  
Yuefeng Zhao ◽  
Yurong Zhang ◽  
Jing Gao ◽  
Xu Wang ◽  
Hui Li ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Mass Spectrometer ◽  
Single Photon ◽  
Time Of Flight ◽  
Ionization Time ◽  
Ozone Generation ◽  
Flight Mass Spectrometer ◽  
Volatile Organic ◽  
Photon Ionization

The single-photon ionization time-of-flight mass spectrometer (SPI-TOFMS), which has high sensitivity, high accuracy, and a short response time, is effective for the real-time monitoring of volatile organic compounds (VOCs). In this study, the theory and structural composition of the SPI-TOFMS are described. Its detection limit can reach parts per billion by volume (ppbv), the dynamic range is better than three orders of magnitude, and the response speed can reach milliseconds. The distribution of VOCs and the ozone generation contribution rate in the Hefei Economic Development Zone are analyzed using this instrument with a vehicle platform for online navigation detection. The experimental results showed that aromatics were the primary components of the total volatile organic compounds (TVOCs), and aromatics and alkenes contributed more to ozone formation in an industrial manufacturing area. This research indicates that the SPI-TOFMS can rapidly and accurately conduct online monitoring of VOCs in industrial development zones. In addition, it has been applied in the fields of atmospheric composition observation, environmental monitoring, and industrial VOC leakage monitoring.

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