Directly-heated type tubular film enriching and sampling device used for online mass spectrum
A sampling device and tubular membrane technology, which is applied in the field of direct heating tubular membrane enrichment sampling device, can solve the problems of slow permeation speed, small membrane area, and easy rupture of the membrane, so as to increase the rate and increase the transmittance and permeation rate, the effect of accelerating the desorption
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[0016] In order to improve the permeability and rate of the sample in the membrane sampling device. The invention provides a direct heating tubular membrane enrichment sampling device for online mass spectrometry.
[0017] Such as figure 1 As shown, the present invention is applied to a mass spectrometer, wherein 1 is a tubular membrane, 2 is a heating wire, 3 is a membrane sampling cavity, 4 is a particle filter, 5 is a sampling inlet, 6 is a sampling outlet, and 7 is a sampling metal capillary , 8 is the cavity outside the membrane, 9 is the carrier gas inlet, 10 is the second metal capillary and is directly connected to the mass spectrometry ionization area, 11 is the emergency shut-off solenoid valve. For liquid samples, a peristaltic pump is set at the front end of the sampling inlet 5 to send the liquid sample into the tubular membrane 1, and then discharged from the sampling outlet 6; when a gas sample is used, an air pump is arranged at the front end of the sampling i...
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