Method and apparatus for detecting a target material in a sample by pre-screening the sample for piezoelectric resonance

A method and apparatus for screening samples to determine which samples include a target material. Generally, the samples are pre-screened to determine which of the samples have a piezoelectric resonance when irradiated with an electric field, to thereby indicate the presence of the target material....

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Hauptverfasser: YESINOWSKI JAMES P, LINDQUIST ROY P, MILLER JOEL B, BUESS MICHAEL L, GARROWAY ALLEN M
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creator YESINOWSKI JAMES P
LINDQUIST ROY P
MILLER JOEL B
BUESS MICHAEL L
GARROWAY ALLEN M
description A method and apparatus for screening samples to determine which samples include a target material. Generally, the samples are pre-screened to determine which of the samples have a piezoelectric resonance when irradiated with an electric field, to thereby indicate the presence of the target material. The samples that have the piezoelectric resonance are then further screened by a different process to confirm the presence of the target material. For example, samples that have the piezoelectric resonance are further screened for a specific nuclear quadrupole resonance (NQR), a specific nuclear magnetic resonance (NMR) or a specific visual characteristic, to confirm the presence of the target material in the sample. The apparatus and method can be used, for example, to search luggage at ports of entry for the presence of cocaine hydrochloride or heroin hydrochloride.
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subjects ALARM SYSTEMS
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
ORDER TELEGRAPHS
PHYSICS
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
TESTING
title Method and apparatus for detecting a target material in a sample by pre-screening the sample for piezoelectric resonance
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