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Environmental applications for thermal desorption

Ambient air  Including:
Many chemicals present in ambient air are toxic, or are the root cause of negative health effects, and include the well-studied ‘air toxics’ as well as the ultra-volatile ozone precursors. Increasingly too, semi-volatiles are of concern, particularly in indoor air. Other chemicals are of interest to the analyst because of their low odour threshold (as for the odorous compounds in landfill gas), or for atmospheric research (as for biogenically-derived compounds and certain halogenated greenhouse gases).
Industrial air Including:
Assessing worker exposure to hazardous compounds was one of the first widespread applications of thermal desorption. Along with related industrial applications such as monitoring of stack gases and fenceline (boundary) emissions, it continues to be of importance to this day​. Particular emphasis is placed on ensuring the safety of factory workers, as well as minimising the impact of industry upon local communities and the wider environment – as enshrined in US EPA Method 325.

 

Soil gas Including:
In addition to air monitoring, thermal desorption and related sampling techniques are used extensively for measuring VOCs in soil. The problem of vapour intrusion into buildings has received much study in the USA, and uses similar analytical approaches to those employed when remediating brownfield sites. Likewise, soil sampling can also be used for the rapid pinpointing of leaks from pipelines, and so minimise the impact on the environment.
Water  Including:
A well-established application of thermal desorption in water analysis regards the detection in piped water of very low levels of odorous compounds, which are often the cause of complaints to water companies. Another area of more recent interest is the presence of potentially harmful semi-volatiles in watercourses, derived from the use of pharmaceuticals and personal care products. In both cases thermal desorption helps the analyst to detect and identify the relevant compounds at the very low levels required.
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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