Electrolysis: processes – compositions used therein – and methods – Electrolytic analysis or testing – For ph
Patent
1996-08-07
1997-12-16
Bell, Bruce F.
Electrolysis: processes, compositions used therein, and methods
Electrolytic analysis or testing
For ph
204406, 204416, 204418, 205775, 2057825, 422 681, 422 69, 422 8201, 422 8202, 436150, G01N 2726
Patent
active
056980892
ABSTRACT:
Chemical sensors for detecting analytes in fluids comprise first and second conductive elements (e.g. electrical leads) electrically coupled to and separated by a chemically sensitive resistor which provides an electrical path between the conductive elements. The resistor comprises a plurality of alternating nonconductive regions (comprising a nonconductive organic polymer) and conductive regions (comprising a conductive material) transverse to the electrical path. The resistor provides a difference in resistance between the conductive elements when contacted with a fluid comprising a chemical analyte at a first concentration, than when contacted with a fluid comprising the chemical analyte at a second different concentration. Arrays of such sensors are constructed with at least two sensors having different chemically sensitive resistors providing dissimilar such differences in resistance. Variability in chemical sensitivity from sensor to sensor is provided by qualitatively or quantitatively varying the composition of the conductive and/or nonconductive regions. An electronic nose for detecting an analyte in a fluid may be constructed by using such arrays in conjunction with an electrical measuring device electrically connected to the conductive elements of each sensor.
REFERENCES:
patent: 4759210 (1988-07-01), Wohltjen
patent: 4907441 (1990-03-01), Shurmer
patent: 4992244 (1991-02-01), Grate
patent: 5045285 (1991-09-01), Kolesar, Jr.
patent: 5120421 (1992-06-01), Glass et al.
patent: 5417100 (1995-05-01), Miller et al.
Lundstrom, I., et al., "Artificial `ofactory` images from a chemical sensor using a light-pulse technique," Nature, 352:47-50 (1991).
Shurmer, H.V., et al., "Odour discrimination with an electronic nose," Sensors and Actuators G, 8:11 (1992).
Gardner, J.W., et al., "Integrated Tin Oxide Odour Sensor," Sensors and Actuators B,4:117-121 (1991).
Gardner, J.W., et al., "Application of an electronic nose to the discrimination of coffees," Sensors and Actuators B, 6:71-75 (1992).
Grate, J.W., et al., "Solubility interactions and the design of chemically selective sorbent coatings for chemical sensors and arrays," Sensors and Actuators B, 3:85-111 (1991).
Grate, J.W., et al., "Smart Sensor System for Trace Organophosphorus and Organosulfur Vapor Detection Employing a Temperature-Controlled Array of Surface Acoustic Wave Sensors, Automated Sample Preconcentration, and Pattern Recognition," Anal. Chem., 65:1868-1881 (1993).
Stetter, J.R., et al., "Quality classification of grain using a sensor array and pattern recognition," Analytica Chimia Acta, 284:1-11 (1993).
Pearce, T.C., et al., "Electronic Nose for Monitoring the Flavour of Beers," Analyst, 118:371-377 (1993).
Shurmer, H.V., et al., "Integrated Arrays of Gas Sensors Using Conducting Polymers with Molecular Sieves," Sensors and Actuators B, 4:29-33 (1991).
Topart, P., et al., "Characterization of the Interaction between Poly(pyrrole) Films and Methanol Vapor," J. Phys. Chem., 96:7824-7830 (1992).
Charlesworth, J.M., et al., "Mechanistic Studies on the Interactions between Poly(pyrrole) and Organic Vapors," J. Phys. Chem., 97:5418-5423 (1993).
Gardner, J.W., et al., "Design of Conducting Polymer Gas Sensors: Modelling and Experiment," Synthetic Metals, 55-57:3665-3670 (1993).
Gardner, J.W., et al., "Detection of vapours and odours from a multisensor array using pattern-recognition techniques Part 2. Artificial neural networks," Sensors and Actuators B, 9:9-15 (1992).
Gardner, J.W., et al., "Detection of Vapours and Odours from a Multisensor Array Using Pattern Recognition Part I. Principal Component and Cluster Analysis," Sensors and Actuators B, 4:109-115 (1991).
Bartlett, P.N., et al., "Electrochemical Deposition of Conducting Polymers onto Electronic Substrates for Sensor Applications," Sensors and Actuators, A21-A23:911-914 (1990).
Gardner, J.W., et al., "A multisensor system for beer flavour monitoring using an array of conducting polymers and predictive classifiers," Sensors and Actuators B, 18-19:240-243 (1994).
Gardner, J.W., et al., "A brief history of electronic noses," Sensors and Actuators B, 18-19:221-220 (1994).
Zaromb, S., et al., "Theoretical Basis for Identification and Measurement of Air Contaminants Using an Array of Sensors Having Partly Overlapping Selectivities," Sensors and Actuators, 6:225-243 (1984).
Freund Michael S.
Lewis Nathan S.
Bell Bruce F.
California Institute of Technology
Trecartin Richard F.
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