Gas chromatography-mass spectrometerGC-MS combines the high separation capability of gas chromatography (GC) with the high sensitivity detection capability of mass spectrometry (MS), and plays an important role in the field of chemical analysis.

Gas chromatography-mass spectrometerIt mainly consists of the following modules:

Gas chromatography module:

Sample injection system: supports split/non split injection, large volume injection, etc., to meet different sample requirements.

Chromatographic column: Select polar or non-polar columns based on the analysis target to achieve efficient separation.

Temperature control system: The column temperature box supports multi-stage programmed heating, with a wide temperature range to ensure separation stability.

Mass spectrometry detection module:

Ion source: commonly used electron bombardment source to generate stable ion fragments.

Quality analyzer: quadrupole, ion trap, or triple quadrupole to achieve high-resolution separation.

Detector: Electron multiplier with sensitivity up to FG level.

Data processing system: equipped with professional software, supporting full scan (SCAN) and selective ion monitoring (SIM) modes, to achieve rapid qualitative and quantitative analysis.

advantage

Efficient separation and detection capability

GC section: Separation of compounds in complex samples can be achieved through chromatographic columns, even if the physical and chemical properties between components are similar, baseline separation can be achieved by optimizing chromatographic conditions.

MS part: Perform ionization and mass analysis on the separated components, achieve high selectivity detection through mass to charge ratio (m/z), and avoid interference from co effluent.

high sensitivity

The detection limit can reach ng/g (nanogram level) or even fg/g (picogram level), suitable for trace analysis.

quick analysis

The single analysis time is usually completed within a few minutes to several tens of minutes, and can be further shortened and the flux improved through rapid heating technology.

High qualitative ability

Mass spectrometry provides specific fragment ion information of compounds, which can be quickly and accurately identified by comparing with standard spectral libraries, reducing the risk of misjudgment.

Wide application range

Suitable for the analysis of volatile or thermally stable compounds, covering multiple fields such as environmental monitoring, food safety, pharmaceuticals, petrochemicals, etc.

Quantitative analysis accuracy