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H2O2 NMR Sensor - Nuclear Magnetic Resonance Method for Detecting Hydrogen Peroxide

31.03.2009
The detection of explosives or of chemical precursors of

explosives is gaining considerable importance due an increasing threat of terrorist attacks. It is particularly important at airports for the inspection of passenger luggage and in the freight business for the inspection of parcels. Several techniques, of which many are based on

X-rays and some are based on nuclear quadrupole resonance have been tested and implemented in the past. However, in particular X-ray scans of checked and hand luggage does not usually give sufficient evidence whether or not a liquid detected is harmless such as water, milk and the like or dangerous as an explosive or as a precursor of an explosive like hydrogen peroxide. In the past, different nuclear magnetic resonance (NMR) techniques have tested. NMR spectroscopy is attractive in particular, as it allows a clear discrimination of the sample’s chemistry while the signature of NMR relaxation appeared to be less significant. Until now these techniques have not been implemented as the time necessary to perform such measurements was perceived to be is too long and the operative efforts for obtaining the required resolution to be too high.

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