Online enrichment system for gaseous and granular semi-volatile organic compounds and method and application
A semi-volatile and organic technology, applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the problems of low recovery rate, large instrument volume, and failure to meet the detection limit requirements of detectors, etc.
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[0079] The present invention will be described in further detail below in conjunction with specific examples. The following examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.
[0080] Structures not described in detail in the present invention can be understood as conventional structures in the art.
[0081] An online enrichment system for gaseous and particulate semi-volatile organic compounds, such as figure 1 As shown, the system includes a gasification chamber 1, an electromagnetic three-way valve 2, a first two-position six-way valve 3, a particle trap 5, a primary trap 6, a secondary focusing trap 7, a second two-position Six-way valve 8, first mass flow controller 9, second mass flow controller 17, sampling pump 10, gas chromatography mass spectrometry detection system 12, vortex tube 13, enrichment-thermal desorption device 14, gas supply and pressure control system 15. Injection tube 4 and heat tracing syst...
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