Kore Compact
EI-TOF-MS
Transportable EI-TOF-MS for rapid and sensitive gas analysis
- Analyse gases rapidly on site
- Detect VOCs down to ppb levels
- Monitor processes over hours or days
- Capture fast-changing chemical events
- Transport easily between measurement locations
Trusted by laboratories, universities and industrial research facilities worldwide.
< 1 sec
Response Time
with capillary inlet
1000+
Mass Resolution
FWHM
50ppb
Detection Levels
<50ppb benzene detected in 10 seconds
Compact design
Transportable format
440 × 280 × 520mm
Powerful Performance, Compact Size.
The Kore Compact EI-TOF-MS is a modular, computer-controlled time-of-flight mass spectrometer available as a bench-top instrument. Its compact size and transportable design make it suitable for moving between laboratories, production sites, field locations, or customer facilities where rapid and sensitive gas analysis is required.
The system is well suited to production and research applications, including process monitoring, catalysis studies, reaction kinetics, VOC monitoring, cleanroom air quality, and odour analysis. It analyses gases at pressures from millibars to 10 bar and can support stable long-term measurements as well as short-duration, high time-resolution experiments.
Key Features.
Transportable bench-top design
Compact 440 × 280 × 520mm format for on-site use.
Electron ionisation source
70eV EI produces database-searchable fragmentation patterns.
Capillary inlet
Enables rapid gas analysis with response times below one second.
Membrane inlet
Increases VOC sensitivity, including benzene detection below 50ppb.
High time-resolution mode
Data streamed to disk and replotted at user-defined time intervals.
Process monitor mode
Plot the evolution of selected species live over long experiments.
GC interfacing capability
Can couple to systems such as PREFICS as a fast MS detector.
Software sensitivity settings
Supports concentration ranges from ppb levels to 100%.
Specifications.
| SPECIFICATION | VALUE |
|---|---|
| Concentration range | Ppb levels to 100%, with four software sensitivity settings |
| Maximum sensitivity (capillary inlet) | Krypton in air at 1.1 ppm in 10 seconds; Xenon in air at 90 ppb in 1 minute |
| Maximum sensitivity (membrane inlet) | Benzene detection limit below 50 ppb in 10 seconds |
| Mass resolution | Greater than 1000 m/Δm (FWHM) |
| Mass range | No inherent TOF limit; practical range 1–1000 m/z for gas-phase thermochemistry (variable energy EI down to 10eV available on request) |
| Ion source | 70 eV electron impact, compatible with NIST database searching |
| Dimensions | 440 × 280 × 520 mm |
| Pumping | 85 L/s turbomolecular pump backed by a diaphragm pump |
| Ion source baking | Up to 100°C; hot source available on request |
| Supplied inlets | Capillary inlet and membrane inlet |
| Response time | With capillary inlet, < 1 second |
| With membrane inlet, approximately 10 seconds (benzene) | |
| Time to operation after transport | Approximately 30 minutes |
How It Works.
The Compact EI-TOF-MS uses electron ionisation to ionise gas-phase analytes before time-of-flight mass analysis. In EI, a beam of electrons, usually at 70eV, removes an electron from the analyte molecule during collision. This produces molecular and fragment ions that create a characteristic mass spectral pattern.
Because EI is a hard ionisation technique, it often produces many fragment ions. These fragmentation patterns can be compared with established databases such as NIST, supporting compound identification and mass spectral deconvolution. EI is especially widely used for VOC and SVOC analysis.
Gas samples can be introduced through different inlet systems. The capillary inlet supports very rapid analysis of inorganic gases and higher-concentration VOCs, while the membrane inlet improves sensitivity for VOC detection. The instrument can also be coupled to a gas chromatograph, including Kore’s PREFICS system, to operate as a fast MS detector for separated compounds.
Configurations / Options.
Capillary inlet
Standard inlet for rapid inorganic gas and high-concentration VOC analysis.
Membrane inlet
Standard inlet for improved VOC sensitivity and inorganic gas detection.
GC interface option
Enables use of the EI-TOF-MS as a fast detector for gas chromatography workflows.
PREFICS coupling
Supports pre-concentration and chromatographic separation before EI-TOF-MS detection.
Multi-position valve integration
Customised instruments can include process gas valve systems.
Internal and external heated inlet lines
Available up to 200°C with passivated inert materials.
Desorber inlet modules
Includes PTFE swab, trap tube, and SPME desorber options.
Flight case option
Reusable shock-protected transport case for regular field deployment.
Operating Modes.
High Time-Resolution Mode
For short-duration experiments, typically up to around 20 minutes, the system can stream information from all detected ions directly to disk. The data can then be replayed with the experiment time resolution selected by the user, subject to counting statistics.
This allows users to request full mass spectra in time slices as short as 100ms, or to plot the time evolution of any selected species at 100ms resolution. This mode is useful for extracting maximum information from short-term or rapidly changing experiments.
Process Monitor Mode
For longer experiments lasting many hours or days, it is not practical to store every recorded ion continuously. Instead, the user can request that a mass spectrum of a defined duration is acquired at defined intervals.
In this mode, selected species are plotted live against elapsed experiment time. A full mass spectrum can also be saved at each data point, allowing users to reconstruct the time evolution of any mass species after the experiment at the time resolution set by the recording frequency.
Integration
The Compact EI-TOF-MS can be used as a stand-alone bench-top gas analyser or integrated into wider analytical workflows. It can connect to gas inlet modules, heated inlet lines, desorption systems, GC interfaces, and customised process gas sampling arrangements.
For field or multi-site use, the instrument can be transported in reusable padded wooden crates or optional shock-protected flight cases. After transportation, the time to operation is approximately 30 minutes, making the system suitable for mobile or site-based measurement work.
Technical Resources. Expert Support.
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