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Updated: Apr 3, 2026

Analysis of Volatile and Oxidation Sensitive Compounds Using a Cold Inlet System and Electron Impact Mass Spectrometry
Published on: September 5, 2014
Development of a portable "brick" mass spectrometer for volatile organic compounds analysis
Yiling Li1, Feng Fa2, Yongguang Han1
1School of Medical Technology, Beijing Institute of Technology, Beijing, 100081, China.
None:
Volatile organic compounds (VOCs) are critical indicators of air pollution, necessitating rapid detection for public and environmental safety. This study presents an enhanced portable "brick" mass spectrometer with a single ultraviolet photoionization source (SPI-BMS) for VOC analysis. By implementing a reengineered continuous atmospheric pressure interface and optimizing the vacuum architecture, the total instrument mass was reduced to approximately 8 kg. We systematically investigated key parameters (e.g., pump configuration, capillary geometry), revealing their direct impact on sensitivity, stability, and resolution. After optimization, the SPI-BMS achieves unit mass resolution and relatively rapid responses. In the basic configuration, the system achieved a detection limit of 8.9 ppbv for methyl methacrylate, which was further improved to 3.7 ppbv with the addition of an auxiliary diaphragm pump. The SPI-BMS balances portability and analytical performance, making it a powerful tool for sensitive on-site detection of VOCs.
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