working principle:
After the environmental atmosphere is collected by the sampling system, it enters the concentration system. Under ultra-low temperature conditions, volatile organic compounds in the atmosphere are frozen and captured in the air capillary capture column; Then quickly heat and analyze, allowing the compound to enter the GCMS analysis system; After separation by chromatographic column, it was detected by FID and MS detectors.

　　Instrument features:
Ultra low temperature air tube captures trace VOCs in the air, with higher capture and desorption efficiency than adsorbents. The system has a low detection limit and good repeatability;
The unique dual channel capture and analysis technology allows dual detectors to analyze simultaneously, improving data integrity and chromatographic resolution;
By using GCMS gas chromatography-mass spectrometry for detection, both known and unknown compounds can be qualitatively and quantitatively analyzed, overcoming the disadvantage of FID detectors that can only analyze known compounds and cannot qualitatively analyze unknown compounds;
Excellent capture and analysis capabilities for low boiling point volatile organic compounds such as ethane and ethylene.

　　Scope of application:
Can be used for full analysis of toxic and harmful gases in industrial hygiene and work sites;
Can be used for urban air quality monitoring, qualitative and quantitative analysis of VOCs in key monitoring areas and factory boundaries;
Can be used for third-party inspection and testing institutions;
Can be used for emergency monitoring in the event of sudden environmental pollution incidents (mobile).