NOVEL SENSORS FOR METAL-ION DETECTION AND QUANTIFICATION

Award Information
Agency:
Environmental Protection Agency
Branch
n/a
Amount:
$149,605.00
Award Year:
1989
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Award Id:
8213
Agency Tracking Number:
8213
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
64550 Research Road, Bend, OR, 97701
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
David J Edlund
(503) 382-4100
Business Contact:
() -
Research Institution:
n/a
Abstract
METALS AND METAL COMPLEXES PLAY AN IMPORTANT ROLE IN MANY INDUSTRIAL PROCESSES. DUE TO THE WIDESPREAD AND LARGE-SCALEUSE OF METALS, MONITORING THEIR PRESENCE IN WASTE STREAMS AND CONTROLLING THEIR LEVELS OF DISCHARGE INTO THE ENVIRON-MENT ARE DIFFICULT AND COSTLY TASKS--TASKS THAT ARE ALL THE MORE IMPORTANT GIVEN THE TOXICITY OF MANY COMMONLY USED METALS. CURRENTLY AVAILABLE SENSOR TECHNOLOGY FOR ON-SITE METAL -ION DETECTION IS LIMITED TO ION-SELECTIVE ELECTRODES (ISE) --FRAGILE, SLOW, HIGH-MAINTENANCE DEVICES THAT ARE SUSCEPTIBLE TO INTERFERENCE AND FOULING. THE ALTERNATIVE IS EXPENSIVE AND TIME-CONSUMING OFF-SITE LABORATORY ANALYSIS. THE TECHNIQUES AT HAND ARE CLEARLY NOT ADEQUATE FOR ADDRESS-ING THE PROBLEM. AS A NEW MEANS OF MEETING THIS CHALLENGE, THIS RESEARCH WILLATTEMPT TO DEVELOP THIN-FILM SENSORS THAT CAN BE CHEMICALLY "TUNED" SELECTIVELY FOR EACH OF THE FOLLOWING TOXIC-METAL IONS: CR3+, CR6=, CD2+ AND BA2+. SINCE THERE ARE NO COMMERCIALLY AVAILABLE SENSORS FOR CR3+, CR6+, AND BA2+, AND SINCETHE CURRENT TECHNOLOGY FOR REMOTE DETETION OF CD2+ IS INADE-QUATE, THE SENSORS TO DEVELOPED IN THIS PROGRAM SHOULD FIND WIDE APPLICATION IN POLLUTION MONITORING AND CONTROL. PRELIMINARY INDICATIONS ARE THAT ANALYTE-SENSITIVE THIN-FILMSENSORS CAN BE MADE TO BE VERY SENSITIVE AND SELECTIVE FOR CR3+, CR6+, CD2+ AND BA2+. THESE SENSORS, ONCE DEVELOPED, WILL FIND APPLICATION IN FEEDBACK CONTROL LOOPS FOR THE PRE-VENTION OF EXCESSIVE DISCHARGE OF TOXIC METAL IONS INTO THE ENVIRONMENT AND IN MONITORING THE METAL-ION CONCENTRATION ININDUSTRIAL PROCESSES TO AID IN RECYCLING AND RESOURCE-RECOV-ERY EFFORTS. THESE SENSORS CAN ALSON PROVIDE EARLY WARNING OF GROUNDWATER CONTAMINATION.

* information listed above is at the time of submission.

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