Method and sampling device for detection of low levels of a...

Details Method and sampling device for detection of low levels of a... Method and sampling device for detection of low levels of a...

2005-03-29

2005-03-29

Porta, David (Department: 2878)

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

Reexamination Certificate

active

06872946

ABSTRACT:
A process for detecting low levels of a predetermined quality trait present in an inhomogeneously distributed particulate substrate involving the steps of: (a) providing a particulate substrate to be analyzed; (b) providing a spectrometer with an electromagnetic detector capable of performing spectroscopic measurements with electromagnetic radiation; (c) providing a rotatable sample holder having a transparent area through which electromagnetic radiation may pass; (d) providing a tumbling member located within the rotatable sample holder for tumbling the particulate substrate contained therein; (e) introducing the particulate substrate into the rotatable sample holder; (f) simultaneously rotating and tumbling the particulate substrate contained within the rotatable sample holder; and (g) activating the spectrometer, thereby illuminating the particulate substrate contained within the rotatable sample holder with electromagnetic radiation.

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patent: 5184191 (1993-02-01), Krishnan
patent: 5408512 (1995-04-01), Kuwabara et al.
patent: 5886525 (1999-03-01), Yesinowski et al.
patent: 5936244 (1999-08-01), Yajima et al.
patent: 6483583 (2002-11-01), Wright et al.

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