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GAS CHROMATOGRAPH- IMS         GAS CHROMATOGRAPHY SYSTEM
 
 
Gas Chromatograph - Ion Mobility Spectrometer
Gas Chromatograph-Ion Mobility Spectrometer
 
VOC Trace Detection in complex Matrices
 
Sensitive and Selective detection of Volatile Compounds
Gas Chromatograph coupled to Ion Mobility Spectrometer (GC-IMS)
The GC-IMS combines the high selectivity of a chromatographic separation with the extraordinary sensitivity (Low ppbv or g/L range) of an IMS. Therefore it is an excellent analytical tool, even for measurements in complex matrices, such as exhaled air analysis. Due to the possibility to change the polarity of the drift voltage the GC-IMS can detect several substances e.g. ketones, aldehydes, alcohols, amines and phosphor organics as well as halogenated compounds.
The chromatographic pre-separation enables to overcome the technological limitations of the IMS technology caused by ion-ion interactions in complex mixtures and hence assures a selective identification.
 
Application: Product Identification in Beverage Industry
Market: Discrimination of carbonated drinks such as Cola
- Technical Requirement: Product control by producer
- Customers: Producers of carbonated drinks
- Result: Determination by characteristic finger prints
 
Application: Product Quality Control
Market: Early Detection of bad smell
- Background: Amines like Trimethylamine (TMA) can cause odour of fouling fish, some infections, and bad breath
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Technical Requirements: Earliest detection
Customers: Food, packaging, pigments manufacturers
Result: Sensitivity lies in low g/L range in water

 

Application: Process Control during Manufacturing
Market: Detection of Diacetyl in beer during Fermentation

- Background: Diacetyl butter aroma is produced by fermentation process and key parameter for termination of brewing process
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Customers: Breweries
Result: Straight detection of diacetyl in beer within 1 minute without sample treatment
 
Application: Sensitive VOC-Detection
Market: Detection of marker substances in human Breath
- Background: Exhaled volatile organic compounds carry important information about the health of the individual (For example: acetone is marker for diabetes)
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Customers: Medical care
Result: Sensitive detection e.g. of aldehydes (Low ppbv)
 
Advantages:
 
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Stand alone operation due to integrated in-system computer unit.
Manual or automatic operation including data acquisition, analysis, visualisation and data export.
High reproducibility.
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Access to all relevant parameters for method development: temperature control for IMS, column and sample loop, flow control of internal sampling pump, drift and carrier gas.

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Heating mode up to 100 C for fast cleaning of the system.
Direct sampling using electrical six-port-valve and integrated pump.
Software controlled switching between positive and negative ionization mode.
Chromatographic pre-separation of water suitable for samples with high moisture content for example breath.
Simultaneous calibration of different substances.
Adjustable alarm thresholds.
 
 
SPECIFICATIONS
Working principle Ion Mobility Spectrometry (IMS)
Ionisation -radiation source (Tritium (3H))
Activity 2 times 300 MBq, hence below exemption limit of 1 GBq according to the EURATOM guideline
Column type Multi Capillary Column (MCC), type depending on application
Sampling Heated electrical 6-port-valve stainless steel, Gas tight loop (1-10 mL)
Start-up time 5 minutes
Spectra analysis time Few seconds
Detection limits Typically in low ppbv-range
Dynamic range 1-3 orders of magnitude
Display

6.4" TFT, VGA-Display

Input unit Rotary pulse encoder, ESC- push button
Processor 400 MHz X-scale
Data acquisition Ultra-fast ADIO-board
Data processing X-board/ Baseboard
Data storage Minimum 1 GB Compact-Flash
Communication RS232, USB, Ethernet
Electrical connectors 2 x D-Sub 9-pole (For modem, console), D-Sub 15-pole (For external devices), RJ45 (For digital modem or SSH), 2 x USB-A
Power supply 240 V AC, 50 Hz (External supply), 24 V DC/ 5A, XLR-connector (Internal)
Power consumption < 120 Watt
Housing 19" compatible, IP 20 enclosure and EMC certificated
Cooling Axial ventilator, speed control temperature related, maximum 5.5 m per hour
Gas connectors 3 mm stainless steel Swagelok connectors for drift gas inlet, sample gas in- and outlet, carrier gas inlet and IMS gas outlet
Dimensions W 449 x D 375 x H 177 mm
Weight 15.5 kg
 
 
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