Development of continuous dehydration concentration gas chromatography mass spectrometry monitoring system

Project Details


This project aims to develop in-line dehydration and thermal desorption (TD) units to couple with gas chromatogrpahy/mass spectrometry (GC/MS) in series to monitor trace-level ambient volatile organic compounds (VOCs) and hazardous air pollutants (HAPs). An aliquot of air sample is first drawn to the dehydration unit to remove excess water vapor to safeguard TD and GC/MS. Subsequently, the VOC analytes are transferred to the TD unit at subambient temperatures for enrichment and focusing. The TD unit is then flashed heated to desorb VOCs onto GC/MS for separation and detection. In order to control ambient levels of HAPS to minimize health risk and protect the environment, the goals of this project are planned as follows: (1) development of a continuous in-line dehydration and TD unit coupling with GC to form a monitoring system for VOCs and HAPs, as well as the establishment of quality assurance/control procedures for accuracy (recovery), precision and detection limits; (2) the establishment of an off-line GC-FID/MS system in the laboratory to perform qualitative and quantitative analysis of more than 100 target standards, and 90% of these target substances can be continuously monitored on the hourly basis; (3) at least 30 days of on-site monitoring will be conducted at the Liuqing Industrial Park, and its analytical performance be validated by the method of NIEA 715 and the PAMS measurements. Jinyun Technology Development Co., Ltd. is responsible for the assembly and fine-tuning of the TD and dehydration units. This project is expected to solve the key issue of in-line dehydration and TD that serves as the core technique in the analysis of trace-level ambient VOCs and HAPs often at sub-ppbv levels. Both master and PhD students will involve in the project and two journal papers can be published as a result. In addition, a complete system of TD-GC/MS/FID is expected to be produced at Jinyun Technology Development Co.
Effective start/end date1/11/2031/10/21

UN Sustainable Development Goals

In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This project contributes towards the following SDG(s):

  • SDG 2 - Zero Hunger
  • SDG 13 - Climate Action
  • SDG 17 - Partnerships for the Goals


  • Dehydration unit
  • thermal desorption (TD)
  • harzardous air pollutants (HAPs)
  • volatile organic compounds (VOCs)
  • gas chromatography mass spectrometry (GC/MS).


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