METHOD AND APPARATUS FOR TESTING A SAMPLE

摘要

A method of detecting the presence of a particular substance in a given sample comprises exciting nuclear resonance in the substance and detecting the response signals from the substance using a probe, and adjusting the probe in dependence on the character of the sample. Further, a method of resonance testing a sample which gives rise to interfering signals, not due to nuclear resonance, is disclosed, comprising 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.