Develops and manufactures thermal desorption and sampling systems for the trace analysis of volatile organic compounds.

Markes International Ltd

Bridgend, UK · Offenbach am Main, DE · Sacramento, USA · Kitchener, Canada · Shanghai, China · Peterborough, UKNew on Amplifa

1997Founded

6Locations worldwide (UK, DE, USA, Canada, China, SepSolve

C2–C44Analyte range covered by the TD systems

over 50,000 sq.ftArea of factory, technical centre and headquarters in

About Markes International

Markes International, a brand of the Velaris Group, is a manufacturer of technologies for extending the analytical capability of gas chromatography. The company manufactures thermal desorption instruments (UNITY-xr, TD100-xr, UNITY-Air Server-xr, UNITY-CIA Advantage-xr, UNITY-ULTRA-xr), the Centri sample introduction platform for automated extraction and enrichment, and sampling techniques such as headspace, SPME, HiSorb and direct desorption. The portfolio is complemented by sorbent tubes, focusing traps and consumables; the subsidiary SepSolve provides GC×GC modulators, BenchTOF time-of-flight mass spectrometers and software (ChromSpace, ChromCompare+). The systems cover an analyte range from C2 to C44 including thermally labile compounds, operate cryogen-free via Peltier cooling, and are certified as multi-gas instruments for helium, nitrogen and hydrogen. Applications include environmental and air monitoring, materials and emissions analysis, food, flavour and fragrance analysis, breath gas analysis, petrochemicals, and tobacco and e-cigarette testing. Factory, technical centre and headquarters are located in Bridgend (Wales, UK); in Germany, Markes International GmbH is based in Offenbach am Main.

Site: Offenbach am Main
Processes: Thermal Desorption (TD) for trace analysis of VOC/SVOC in gases,
Materials: Thermal Desorption (TD), Multi-Gas Technology, Cryo-free Cooling, Backflush Trap Desorption, GC×GC Modulation (SepSolve INSIGHT), BenchTOF2 Time-of-Flight Mass Spectrometer
Certificates: ISO 9001, ISO 14001
Founded: 1997 (
Industries: Environmental and air monitoring, Materials and emissions analysis, Food and flavour analysis, Fragrances and flavourings, Petrochemicals, Tobacco and e-cigarettes

01
Sampling (active, passive, headspace, SPME, HiSorb, direct desorption)
02
Sample enrichment and pre-concentration (focusing trap)
03
Thermal desorption
04
Gas chromatography (GC/GC×GC)
05
Detection (TOF-MS)
06
Data evaluation and chemometrics

Technologies and Processes

Thermal Desorption (TD)

Trap-based enrichment and desorption of VOC/SVOC from gases, liquids and solids for GC-MS analysis.

Multi-Gas

Multi-Gas Technology

Externally certified operation of the TD instruments with helium, nitrogen or hydrogen as carrier gas.

Cryo-free

Cryo-free Cooling

Peltier-cooled focusing traps replace liquid cryogens and lower operating costs.

Backflush

Backflush Trap Desorption

Multiple sorbent beds allow the analysis of a wide volatility range in a single run.

GC×GC

GC×GC Modulation (SepSolve INSIGHT)

Two-dimensional gas chromatography for the separation of complex samples.

TOF MS

BenchTOF2 Time-of-Flight Mass Spectrometer

High-resolution detection of trace components in complex matrices.

Locations

Bridgend

Headquarters, factory and technical centre

Materials: Thermal desorption, sampling technology, sorbent tubes

Research and Development
Manufacturing
Engineering
Customer demonstration laboratory

Offenbach am Main

Sales and support centre Germany (Markes International GmbH)

Training and workshop laboratory

Sacramento

Support and applications laboratory USA

Kitchener

Canadian branch office

Shanghai

Support centre China

Peterborough

SepSolve: technical laboratory and demonstration site

Materials: GC×GC, TOF-MS, software

Demonstration and applications laboratory

Products

**TD100-xr Thermal Desorber**Thermal desorption · Environmental and materials analysis

**Centri Sample Enrichment System**Automated sample preparation · Food and flavour analysis

**Sorbent Tubes**Sampling · Environmental monitoring

**Multi-Gas-capable TD Instruments**Hydrogen carrier gas operation · Routine laboratory

Inside the production

Industries

Environmental and air monitoringMaterials and emissions analysisFood and flavour analysisFragrances and flavouringsPetrochemicalsTobacco and e-cigarettesMedical technology and breath gas analysisConstructionAutomotive suppliersPharmaceuticals and biochemistry

Processes & technical limits

Processes	Tolerance	Max. part	Weight	Lot size	Materials
Thermal Desorption (TD) for trace analysis of VOC/SVOC in gases,	–	–	–	–	–

Quality

Markes instruments comply with regulatory standard methods such as US EPA TO-17, EPA 325, US EPA 8270, EU Tobacco Products Directive 2014/40/EU, ISO 16000 and EN 16516. The company is certified to ISO 9001 and ISO 14001.

Evidence	Bridgend
ISO 9001
ISO 14001

History

1997
Founding of Markes International
2007
Introduction of the patented TubeTAG system for tube tracking
Acquisition by the Velaris Group; integration of SepSolve into the Markes portfolio