Low-temperature pressurization head space sample injection device for measuring volatile substances in atmosphere through GC-MS (gas chromatography-mass spectrometer) technology
A GC-MS and volatile substance technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of analysis result error, poor reproducibility, large error, etc., and achieve the effect of improving sensitivity, not easy to evaporate, and reducing interference
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[0026] Such as Figure 1-5 As shown, a low-temperature pressurized headspace sampling device for GC-MS determination of volatile substances in the atmosphere includes:
[0027] The reciprocating all-glass piston pump consists of a glass piston cylinder 1, a one-way valve a2, a one-way valve b3, a clamping clip 4, a crank linkage mechanism 5, a micro motor 6, and a worm reducer 7, and the glass piston cylinder One end of cylinder 1 is provided with parallel one-way valve a2 and one-way valve b3, and the piston at the other end is sequentially connected to crank linkage mechanism 5, worm reducer 7, and micro motor 6 through clamping clip 4, and said one-way valve a2 is connected to Sampling tube 13;
[0028] The headspace bottle for sampling includes the headspace bottle 10. The headspace bottle is provided with a seal, and two injection needles, one long and one short, are inserted into the seal, wherein the long needle touches the bottom as the inlet needle 8, and the short n...
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