Electrochemical detection device

Details Electrochemical detection device Electrochemical detection device

1977-11-30

1979-04-17

Jones, Raymond N.

Textiles: fiber preparation

204195B, C12K 104

Patent

active

041499387

ABSTRACT:
An electrochemical detection device for detecting micro-organisms. A standard pH reference electrode and a platinum cathodic electrode are positioned in a container with suitable nutrient medium for microbial growth plus the sample to be tested. The two electrodes are connected to electronic circuitry including an up/down counter which counts up for the first 80 minutes after a test has been initiated. Then the potential between the two electrodes is tracked by the electronic circuitry and after there is a change of 10 mv a signal is sent to the up/down counter to cause it to reverse its count. Thereafter when there is a additional 20 mv change in the potential between the two electrodes another signal is sent to the up/down counter signalling it to stop. The resulting count on the counter is equal to the length of time for the inoculum to begin the production of measurable amounts of H.sub.2 after inoculation. This length of time is indicative of a endpoint.

REFERENCES:
patent: 3162585 (1964-12-01), De Ford et al.
patent: 3520660 (1970-07-01), Webb
patent: 3633012 (1972-01-01), Wilhelmson
patent: 3694317 (1972-09-01), Scher
patent: 4009078 (1977-02-01), Wilkins et al.

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