Detection method for liquids using near infrared spectra

Details Detection method for liquids using near infrared spectra Detection method for liquids using near infrared spectra

1990-09-12

1993-02-16

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250339, 250343, 2503581, 356341, 356407, G01N 2135, G01N 2151

Patent

active

051873680

ABSTRACT:
A method for detecting the presence or absence of microorganisms in a liquid test sample is provided without need for withdrawing an aliquot or destroying the sample. The method comprises taking near-infrared spectra of the sample and comparing it visually or mathematically to the spectra of a standard, which may be the values of the spectra known to the operator or may be a standard sample that is provided and run side-by-side.

REFERENCES:
patent: 4118625 (1978-10-01), Underwood
patent: 4367041 (1983-01-01), Webb, Jr. et al.
patent: 4755048 (1988-07-01), Kaufman
patent: 4768879 (1988-09-01), McLauchlan et al.
patent: 4969741 (1990-11-01), Kennedy et al.
patent: 4998824 (1991-03-01), Littlejohn et al.

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