Principle:
The vaporized samples were separated by GC by entering the chromatographic column, and the separated compounds were detected by MS. By integrating NIST spectrogram retrieval function, the target analyte can be retrieved conveniently and accurately.
GCMS is a stable and efficient design of EI source, which realizes efficient ion transmission and makes the temperature of ion source more uniform. The automatic control system of emission electron flow provides a continuously adjustable bombardment electron flow of 50- 100ev.
Extended data:
Independent, reliable and stable ion source heating system with controllable temperature range of 120℃- 400℃. It can effectively reduce the pollution problem of ion source and make the database retrieval more reliable. The double-wire design prolongs the wire changing period and improves the analysis efficiency.
The quadrupole mass analysis system with front quadrupole can effectively improve the influence of ion pollution, and realize the long-term stability of the instrument through high-performance secondary electron multiplier and low noise. The detection system composed of high-bandwidth signal amplifiers provides a guarantee for the acquisition of weak signals.
References:
Baidu Encyclopedia-GC-MS
References:
Baidu Encyclopedia-GC-MS Analysis