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Membrane Interface Probe (MIP)
The Membrane Interface Probe (MIP) is designed to delineate and characterise contamination on potentially polluted sites. The probe has a raised heated plate housed behind the cone tip; the heated plate causes any Volatile Organic Compounds (VOCs) in the ground to volatise so that they can pass through a semi permeable membrane, also mounted on the heated plate.
A nitrogen flow is passed behind the membrane component and any VOCs are carried in the stream to an array of detectors; Dry Electrolytic Conductivity Detector (DELCD), Flame Ionisation Detector (FID) and Photo Ionisation Detector (PID). Electrical Conductivity (EC) of the soil is also measured.
The various detectors mean that VOCs can be characterised by their relative responses in each. The responses in the detectors can be viewed in real time allowing for unparalleled scope flexibility and adaptation without the need for site re-visits.
No water sample or soil sample is extracted during MIP testing reducing risk to operators on potentially contaminated sites. However, the instant feedback from the MIP means a quick decision can be made on whether or not sample and laboratory testing is needed, saving both time and money.