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VOC-Mole is a stainless steel assembly that is inserted into the ground, allowing soil gas to be sampled onto a sorbent tube, for analysis using thermal desorption (TD). VOC-Mole is constructed from stainless steel drilled with a series of holes through which soil gases can pass. The probe has a tapered tip, which allows it to be driven into the ground using the dedicated impact former.
Three probe lengths are available for sampling volatiles at different depths:
Versatile sampling options
VOC-Mole uses an aluminium sampling cap to prevent the ingress of water, wildlife and general soil debris, and is easily adapted to two sampling modes:
Alternatively, the tube and pump can be placed entirely outside the VOC-Mole body. Tube and sampling cap assemblies can be prepared in the laboratory and sealed ready for transport to the field (where the probes may already be in situ).
VOC-Mole has a number of applications, ranging from mapping of contaminated land prior to remediation to forensic investigations and chemical ecology studies of soil microorganisms.
As well as GC analysis of tubes, hand-held PID or FID detectors can be used with VOC-Mole for quick screening of vapour levels.
