CA2264839A1 - Sensors for detecting analytes in fluids - Google Patents

Sensors for detecting analytes in fluids

Info

Publication number
CA2264839A1
CA2264839A1 CA002264839A CA2264839A CA2264839A1 CA 2264839 A1 CA2264839 A1 CA 2264839A1 CA 002264839 A CA002264839 A CA 002264839A CA 2264839 A CA2264839 A CA 2264839A CA 2264839 A1 CA2264839 A1 CA 2264839A1
Authority
CA
Canada
Prior art keywords
sensors
conductive
chemical
conductive elements
fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002264839A
Other languages
French (fr)
Other versions
CA2264839C (en
Inventor
Nathan S. Lewis
Erik Severin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
California Institute of Technology CalTech
Original Assignee
California Institute Of Technology
Nathan S. Lewis
Erik Severin
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by California Institute Of Technology, Nathan S. Lewis, Erik Severin filed Critical California Institute Of Technology
Publication of CA2264839A1 publication Critical patent/CA2264839A1/en
Application granted granted Critical
Publication of CA2264839C publication Critical patent/CA2264839C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
    • G01N27/125—Composition of the body, e.g. the composition of its sensitive layer
    • G01N27/126—Composition of the body, e.g. the composition of its sensitive layer comprising organic polymers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array

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 analyze 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.
CA002264839A 1996-08-14 1997-08-11 Sensors for detecting analytes in fluids Expired - Fee Related CA2264839C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/696,128 1996-08-14
US08/696,128 US5788833A (en) 1995-03-27 1996-08-14 Sensors for detecting analytes in fluids
PCT/US1997/014070 WO1998007024A1 (en) 1996-08-14 1997-08-11 Sensors for detecting analytes in fluids

Publications (2)

Publication Number Publication Date
CA2264839A1 true CA2264839A1 (en) 1998-02-19
CA2264839C CA2264839C (en) 2006-05-09

Family

ID=24795824

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002264839A Expired - Fee Related CA2264839C (en) 1996-08-14 1997-08-11 Sensors for detecting analytes in fluids

Country Status (8)

Country Link
US (4) US5788833A (en)
EP (1) EP0918986B1 (en)
AT (1) ATE376181T1 (en)
AU (1) AU718677B2 (en)
CA (1) CA2264839C (en)
DE (1) DE69738217T2 (en)
NZ (1) NZ334530A (en)
WO (1) WO1998007024A1 (en)

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