Industrial and Consumer Products | Markes International

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Microchamber sampling
Online air or gas sampling
Sample extraction supplies
Sorptive extraction
SPME
Standard methods specific supplies
Standards & calibration
Static headspace sampling
Sorptive extraction
Thermal desorption starter kits

Products shown here are related to the application of thermal desorption for consumer and industrial. Or find out more about consumer and industrial product applications

Microchamber sampling

Microchambers are compact, stand-alone test chamber units that allow rapid sampling of vapour-phase organic compounds from a product or material, complementing small-scale chamber testing by third-party laboratories. Microchamber sampling is a type of dynamic headspace sampling and a powerful tool for increasing laboratory productivity. The technique is usually used in combination with sorbent tubes and off-line thermal desorption–GC–MS.

Online air or gas sampling

‘Whole air’ sampling refers to collection of samples in the field using canisters or bags, or their direct introduction to the focusing trap of the thermal desorption instrument without the use of sorbent tubes (online sampling). The compounds remain in the gas phase throughout.

Sample extraction supplies

A range of supplies are required for the busy lab technician needing to perform sample extraction, whether automated or manual. A reliable supply of quality assured items such as vials, caps, liners, syringes, fibers, and probes supports throughput.

Sorptive extraction

Sorptive extraction is an equilibrium process involving interaction between a sorbent and a sample, either by immersion in the sample or through contact in the headspace above the sample. It is commonly used as an alternative to liquid–liquid extraction (LLE) or solid-phase extraction (SPE). Sorptive extraction is a convenient approach for complex samples and for monitoring persistent organic pollutants in foods, beverages and other products derived from natural sources.

SPME

Solid-phase microextraction (SPME) uses a small fiber coated with absorptive phase(s), to extract volatiles in either headspace or immersive modes. SPME extraction is an equilibrium process dependent on the partitioning of analytes between the sample matrix (either liquid, solid or headspace) and the absorptive phase. Analytes that become absorbed into the SPME phase are subsequently desorbed using a heated injector, before transfer to the GC column.

Supplies for standard methods

Markes’ application specialists are active on committees working on standard methods, and also in the development of products to support method compliance. A variety of standard methods are available for monitoring specific VOCs often in prescribed sample types. For example, an automobile industry standard method might focus on materials such as plastic, leather or foam.

Standards & calibration

Calibration of the complete analytical process is of paramount importance when conducting quantitative studies. For TD analysis, additional considerations should be made regarding the loading of standards to be representative of samples, with a variety of tools available to support this.

Headspace sampling

Headspace (HS) has been widely used for quantitative evaluation of VOCs in solid and liquid samples for many years. Samples are placed into vials, sealed and incubated. Once equilibrium is reached VOCs partition into the headspace at levels that are proportional to their concentration in the original liquid or solid sample. A precise aliquot of headspace vapour is then transferred/injected directly into the GC (traditional methods) or via an electrically-cooled focusing trap for enhanced performance.

Sorptive extraction

Sorptive extraction is an equilibrium process involving interaction between a sorbent and a sample, either by immersion in the sample or through contact in the headspace above the sample. It is commonly used as an alternative to liquid–liquid extraction (LLE) or solid-phase extraction (SPE). Sorptive extraction is a convenient approach for complex samples and for monitoring persistent organic pollutants in foods, beverages and other products derived from natural sources.

Starter kits

Markes’ starter kits are designed to provide the essentials needed to get a thermal desorption system up and running quickly, by providing a single package with items such as tubes, traps, tools and other accessories.

Consumer & industrial products

Microchamber sampling

Online air or gas sampling

Sample extraction supplies

Sorptive extraction

SPME

Supplies for standard methods

Standards & calibration

Headspace sampling

Sorptive extraction

Starter kits

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