GB1287190A - Improvements in or relating to apparatus for determining the condition of food - Google Patents

Improvements in or relating to apparatus for determining the condition of food

Info

Publication number
GB1287190A
GB1287190A GB1439470A GB1439470A GB1287190A GB 1287190 A GB1287190 A GB 1287190A GB 1439470 A GB1439470 A GB 1439470A GB 1439470 A GB1439470 A GB 1439470A GB 1287190 A GB1287190 A GB 1287190A
Authority
GB
United Kingdom
Prior art keywords
sample
food
measuring
impedance
electrodes
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.)
Expired
Application number
GB1439470A
Inventor
Gordon Campbell Lowe
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB1439470A priority Critical patent/GB1287190A/en
Publication of GB1287190A publication Critical patent/GB1287190A/en
Expired 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
    • 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
    • G01N33/02—Food

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Food Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

1287190 Measuring condition of food NATIONAL RESEARCH DEVELOPMENT CORP 19 April 1971 [25 March 1970] 14394/70 Heading G1N In an arrangement for determining the extent of spoilage in food e.g. fish by measuring the phase angle of an A.C. current flowing through part of the sample as described in Patent 1262749 the effect of the impedance of the measuring electrodes 3a, 3b is compensated for. The A.C. is applied to the sample 1 by electrodes 2a, 2b and the voltage developed between measuring electrodes 3a, 3b after squaring at 11 is compared in phase detector 15 with the A. C. voltage developed across F. E. T. 5. The drain source impedance of F.E.T. 5 is varied so that its impedance is equal to the sum of the electrode 3a, 3b impedances and the sample whereby the amplitudes of the voltages applied to squaring circuits 11, 13 are substantially the same. Control circuit 14 causes a variable bias to be applied to gate 8 of F.E.T. 5 to maintain these amplitudes the same. Thermistor 21 in contact with sample 1 causes the gain in circuit 15 to change to take into account temperature changes.
GB1439470A 1970-03-25 1970-03-25 Improvements in or relating to apparatus for determining the condition of food Expired GB1287190A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1439470A GB1287190A (en) 1970-03-25 1970-03-25 Improvements in or relating to apparatus for determining the condition of food

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1439470A GB1287190A (en) 1970-03-25 1970-03-25 Improvements in or relating to apparatus for determining the condition of food

Publications (1)

Publication Number Publication Date
GB1287190A true GB1287190A (en) 1972-08-31

Family

ID=10040408

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1439470A Expired GB1287190A (en) 1970-03-25 1970-03-25 Improvements in or relating to apparatus for determining the condition of food

Country Status (1)

Country Link
GB (1) GB1287190A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2827313A1 (en) * 1977-06-24 1979-01-18 Bactomatic Inc EQUIPMENT AND PROCEDURE FOR DETERMINING METABOLIC ACTIVITY
EP0187392A1 (en) * 1985-01-02 1986-07-16 Rafagnataekni (Electronics) A method and an apparatus for determining the degree of freshness of fish or other pieces of meat
ES2074934A2 (en) * 1993-02-25 1995-09-16 Nte Sa Procedure for determining the composition of meat substances.
GB2298923A (en) * 1995-03-11 1996-09-18 Central Research Lab Ltd Sensing the condition of a sample of food
ES2130939A1 (en) * 1996-06-04 1999-07-01 Nte Sa Apparatus for monitoring the technological quality of meat
FR2869687A1 (en) * 2004-04-30 2005-11-04 Probe Inc M METHOD, PROBE AND SENSOR FOR DETERMINING THE QUALITY OF A NUTRIENT, IN PARTICULAR A NUTRIENT OF NATURE CARNEE

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2827313A1 (en) * 1977-06-24 1979-01-18 Bactomatic Inc EQUIPMENT AND PROCEDURE FOR DETERMINING METABOLIC ACTIVITY
US4156180A (en) * 1977-06-24 1979-05-22 Bactomatic, Inc. Apparatus and method for detecting metabolic activity
EP0187392A1 (en) * 1985-01-02 1986-07-16 Rafagnataekni (Electronics) A method and an apparatus for determining the degree of freshness of fish or other pieces of meat
US4758778A (en) * 1985-01-02 1988-07-19 Rafagnataekni (Electronics) Method and an apparatus for determining the degree of freshness of pieces of food
ES2074934A2 (en) * 1993-02-25 1995-09-16 Nte Sa Procedure for determining the composition of meat substances.
GB2298923A (en) * 1995-03-11 1996-09-18 Central Research Lab Ltd Sensing the condition of a sample of food
GB2298923B (en) * 1995-03-11 1998-07-29 Central Research Lab Ltd A device for measuring the phase angle of a sample impedance
ES2130939A1 (en) * 1996-06-04 1999-07-01 Nte Sa Apparatus for monitoring the technological quality of meat
FR2869687A1 (en) * 2004-04-30 2005-11-04 Probe Inc M METHOD, PROBE AND SENSOR FOR DETERMINING THE QUALITY OF A NUTRIENT, IN PARTICULAR A NUTRIENT OF NATURE CARNEE
WO2005116634A1 (en) * 2004-04-30 2005-12-08 M Probe, Inc. Method probe and sensor for determination of the quality of food in particular meat

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees