Method and apparatus for measuring samples and for localizing a

Details Method and apparatus for measuring samples and for localizing a Method and apparatus for measuring samples and for localizing a

1996-01-11

1998-08-04

Soderquist, Arlen

Chemistry: analytical and immunological testing

Nuclear magnetic resonance, electron spin resonance or other...

436145, 436182, 324300, G01N 2408, G01N 2410, G01N 3300, G01V 300

Patent

active

057892571

ABSTRACT:
A method and an apparatus are disclosed for detecting a first substance within a second substance, preferably for localizing diamonds in kimberlite rocks. The first substance, e.g. the diamonds, have a very long spin-lattice relaxation time (T.sub.1) in the order of hours. For rapidly detecting the first substance, the build-up of magnetization of a predetermined kind of nuclei, e.g. .sup.13 C, being abundant in the first substance only is shortened and the nuclear magnetic resonance of that kind of nuclei is measured thereafter. The shortening is executed within a pre-treatment station, whereas the measurement takes place within an analyzing station. The shortening and the measuring, respectively, are carried out within magnetic fields (B.sub.01, B.sub.02) of different field strengths.

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