The 225-MS is a portable GC/MS system that integrates multiple components, including a foreline pump, and supports both EI and CI ionization modes and MS/MS mode.
The Varian 225-MS is the world's first benchtop mass spectrometer to enclose all components, including the foreline pump, in one compact design. This self-contained vacuum module eliminates the need for a separate pump, reducing space requirements and noise while offering maintenance-free operation without oil changes.
The instrument provides exceptional Electron Ionization (EI) and Chemical Ionization (CI) sensitivity, along with advanced MS/MS capabilities to eliminate matrix influences. It is designed as a reliable, flexible analytical tool suitable for both routine and research laboratories, often paired with the Varian 431-GC.
| System Type | Benchtop GC/MS System |
|---|---|
| Vacuum Module | Built-in (self-contained) |
| Footprint | 45 cm (18 in) |
| GC Space Requirement | 31 cm (12 in) |
| Detection Limit | Single digit picogram (pg) levels |
| CI Sensitivity | Over 50-fold greater than single quadrupole |
It is a self-contained module that eliminates the need for a separate, standalone foreline pump and the associated hose, significantly reducing space requirements.
No, the vacuum module does not require oil changes or oil disposal during its lifetime.
Yes, low pressure CI allows the use of liquid reagents such as methanol and acetonitrile, which increases safety and convenience by eliminating the need for gas cylinders.