WO2011065811A3 - System and method to compensate temporal and temperature drift of ion sensor - Google Patents

System and method to compensate temporal and temperature drift of ion sensor Download PDF

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Publication number
WO2011065811A3
WO2011065811A3 PCT/MY2010/000279 MY2010000279W WO2011065811A3 WO 2011065811 A3 WO2011065811 A3 WO 2011065811A3 MY 2010000279 W MY2010000279 W MY 2010000279W WO 2011065811 A3 WO2011065811 A3 WO 2011065811A3
Authority
WO
WIPO (PCT)
Prior art keywords
drift
temperature drift
ion sensor
slope
led
Prior art date
Application number
PCT/MY2010/000279
Other languages
French (fr)
Other versions
WO2011065811A2 (en
Inventor
Mei Yee Ng
Yusoff Yuzman
Original Assignee
Mimos Berhad
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 Mimos Berhad filed Critical Mimos Berhad
Publication of WO2011065811A2 publication Critical patent/WO2011065811A2/en
Publication of WO2011065811A3 publication Critical patent/WO2011065811A3/en

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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
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416—Systems
    • G01N27/4163—Systems checking the operation of, or calibrating, the measuring apparatus
    • 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
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/403—Cells and electrode assemblies
    • G01N27/414—Ion-sensitive or chemical field-effect transistors, i.e. ISFETS or CHEMFETS
    • G01N27/4148—Integrated circuits therefor, e.g. fabricated by CMOS processing

Abstract

The system (100) and method (200) according to the present invention utilizes the light source (105) component in compensating thermal and time drift effect of ISFET sensor (100). A compensating circuit that has variable gain to fine-tune the slope of LED (105) drift such that it matches that of the ISFET (100) drift is applied. Thereafter, a cancellation circuit is used to cancel off the slope of time and temperature drift of the ISFET sensor (100). The LED (105) is employed due to its insensitivity to pH which results in the pH value being accurate.
PCT/MY2010/000279 2009-11-24 2010-11-16 System and method to compensate temporal and temperature drift of ion sensor WO2011065811A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MYPI20094980 2009-11-24
MYPI20094980 2009-11-24

Publications (2)

Publication Number Publication Date
WO2011065811A2 WO2011065811A2 (en) 2011-06-03
WO2011065811A3 true WO2011065811A3 (en) 2011-10-06

Family

ID=44067147

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/MY2010/000279 WO2011065811A2 (en) 2009-11-24 2010-11-16 System and method to compensate temporal and temperature drift of ion sensor

Country Status (1)

Country Link
WO (1) WO2011065811A2 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4371837A (en) * 1979-11-13 1983-02-01 American Can Company Temperature compensated input power and output offset circuits for a hall effect transducer
US4668868A (en) * 1986-02-20 1987-05-26 Noller Hans T Apparatus for performing fluoroimmunoassays of biological specimens
US5294794A (en) * 1993-02-18 1994-03-15 Thermo King Corporation Automatic compensation for ion mobility sensor
JPH0836047A (en) * 1994-07-26 1996-02-06 Chubu:Kk Optical sensor
US20070089988A1 (en) * 2005-10-21 2007-04-26 Wen-Yaw Chung Electronic circuit for ion sensor with body effect reduction
US20080067081A1 (en) * 2006-09-19 2008-03-20 National Yunlin University Of Science And Technology pH measurement system and method for reducing time-drift effects thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4371837A (en) * 1979-11-13 1983-02-01 American Can Company Temperature compensated input power and output offset circuits for a hall effect transducer
US4668868A (en) * 1986-02-20 1987-05-26 Noller Hans T Apparatus for performing fluoroimmunoassays of biological specimens
US5294794A (en) * 1993-02-18 1994-03-15 Thermo King Corporation Automatic compensation for ion mobility sensor
JPH0836047A (en) * 1994-07-26 1996-02-06 Chubu:Kk Optical sensor
US20070089988A1 (en) * 2005-10-21 2007-04-26 Wen-Yaw Chung Electronic circuit for ion sensor with body effect reduction
US20080067081A1 (en) * 2006-09-19 2008-03-20 National Yunlin University Of Science And Technology pH measurement system and method for reducing time-drift effects thereof

Also Published As

Publication number Publication date
WO2011065811A2 (en) 2011-06-03

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