Btg International Limited

Rapiscan Security Products, Inc.

John Alec Sidney Smith

Neil Francis Peirson

Martin Blanz

Laurence Drew Mann

Warrick Paul Chisholm

Timothy Rayner

A method for analysing a chemical substance containing quadrupolar nuclei to determine a measurable characteristic of the substance. The method includes irradiating the substance with RF energy in a prescribed manner to stimulate NQR of certain quadrupolar nuclei within the substance. Then receiving and processing a signal emitted from the substance to isolate an NQR signal therefrom. Thereafter analysing the NQR signal to obtain a measure of the characteristic of the substance; and providing an output indicative of the measure for analytical purposes. Specific methods for analysing a chemical substance during production thereof to determine a characteristic of the substance indicative of the quality thereof, and for searching for chemicals together with specific systems are also described.

System and method for improving the analysis of polymorphic chemical substance forms and concentrations using NQR

A method of detecting the presence of a particular substance in a given sample. According to the method, nuclear resonance is excited in a substance and response signals are detected from the substance using a probe. The probe is adjusted in dependence on the character of the sample. A method of detecting the presence of a sample which gives rise to interfering signals, not due to nuclear resonance, comprises exciting nuclear resonance in the sample, and detecting and processing the response signal from the sample in such a way as to at least partially filter out the interfering signals arising from the sample.

Method of and apparatus for testing a sample

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London, United Kingdom

John Alec Sidney Smith