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VOCs emitted by living organisms

BiogenicsIt is not widely appreciated that the VOCs emitted by plants, moulds, animals and other life-forms – so-called ‘biogenic’ emissions – outweigh global anthropogenic VOC emissions by a factor of 10.

Biogenic VOCs are of current interest to atmospheric chemists dealing with the impact of airborne VOCs on air quality and atmospheric processes in general. However, they are also of interest from a biological perspective, as profiles of compounds such as monoterpenes can help to identify the species emitting them (and their phase of growth).

Biogenic VOCs also have an impact on local and regional atmospheric chemistry, and there are wide differences depending on land use. For example, biogenic emissions in the densely forested Nordic regions of Europe can play an important role in the regional oxidant budget.

In addition, in the marine environment a number of volatile halogenated hydrocarbons are produced by phytoplankton, bacteria and macroalgae, as well as by photochemical processes. These compounds eventually migrate to the atmosphere, where they can influence ozone levels and global climate. As a result, this is a topic of particular interest to atmospheric researchers.

What Markes can offer

The fact that studies of biogenic VOCs are carried out at particular times of the year, and in remote locations, makes sampling costly to repeat – as a result, sample security is paramount.

Sorbent sampling tubes incorporating diffusion-locking technology are a useful innovation in this respect, as they prevent ingress of contaminants or escape of analytes during transport to and from the field. Thermal desorbers that allow re-collection (collecting the split portion of the sample on to a clean tube), such as Markes’ TD100-xr, provide valuable ‘insurance’ against sample loss, should the analytical system fail mid-run.

Another advanced feature specific to sorbent tube sampling is TubeTAG tube-tagging technology, which allows individual samples to be automatically tracked, significantly reducing the time spent in sample logging.

Further information

UK
UK
Markes International Ltd
Gwaun Elai Medi-Science Campus
Llantrisant
RCT
CF72 8XL, UK
Tel: +44 (0)1443 230935
Germany
Germany
Markes International GmbH
Schleussnerstrasse 42
D-63263 Neu-Isenburg
Frankfurt
Germany
Tel: +49 (0)6102 8825569
USA (West)
USA
Markes International, Inc
2355 Gold Meadow Way
Gold River
California 95670
USA
Tel: 866-483-5684 (toll-free)
Part of Schauenburg International
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