CA2895628A1 - Ph indicator device and formulation - Google Patents

Ph indicator device and formulation Download PDF

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Publication number
CA2895628A1
CA2895628A1 CA2895628A CA2895628A CA2895628A1 CA 2895628 A1 CA2895628 A1 CA 2895628A1 CA 2895628 A CA2895628 A CA 2895628A CA 2895628 A CA2895628 A CA 2895628A CA 2895628 A1 CA2895628 A1 CA 2895628A1
Authority
CA
Canada
Prior art keywords
fluid
colour
indicator
change
phenylazo
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.)
Abandoned
Application number
CA2895628A
Other languages
English (en)
French (fr)
Inventor
John Kenneth Hicks
Victoria Jody Hammond
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.)
Smith and Nephew PLC
Original Assignee
Smith and Nephew PLC
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 Smith and Nephew PLC filed Critical Smith and Nephew PLC
Publication of CA2895628A1 publication Critical patent/CA2895628A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N31/00Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
    • G01N31/22Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
    • G01N31/221Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators for investigating pH value
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/145Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue
    • A61B5/14539Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue for measuring pH
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/42Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators with wetness indicator or alarm
    • A61F2013/427Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators with wetness indicator or alarm pH indicator
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/78Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
    • G01N21/80Indicating pH value
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416Systems
    • G01N27/4163Systems checking the operation of, or calibrating, the measuring apparatus
    • G01N27/4165Systems checking the operation of, or calibrating, the measuring apparatus for pH meters

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Biophysics (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
CA2895628A 2013-10-08 2014-10-08 Ph indicator device and formulation Abandoned CA2895628A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB1317746.4 2013-10-08
GBGB1317746.4A GB201317746D0 (en) 2013-10-08 2013-10-08 PH indicator
PCT/EP2014/071520 WO2015052225A1 (en) 2013-10-08 2014-10-08 Ph indicator device and formulation

Publications (1)

Publication Number Publication Date
CA2895628A1 true CA2895628A1 (en) 2015-04-16

Family

ID=49630330

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2895628A Abandoned CA2895628A1 (en) 2013-10-08 2014-10-08 Ph indicator device and formulation

Country Status (11)

Country Link
US (2) US9829471B2 (cg-RX-API-DMAC7.html)
EP (1) EP3055689B1 (cg-RX-API-DMAC7.html)
JP (1) JP6396481B2 (cg-RX-API-DMAC7.html)
CN (2) CN105593679B (cg-RX-API-DMAC7.html)
AU (1) AU2014333841B2 (cg-RX-API-DMAC7.html)
BR (1) BR112015015287A2 (cg-RX-API-DMAC7.html)
CA (1) CA2895628A1 (cg-RX-API-DMAC7.html)
GB (1) GB201317746D0 (cg-RX-API-DMAC7.html)
RU (1) RU2015139562A (cg-RX-API-DMAC7.html)
WO (1) WO2015052225A1 (cg-RX-API-DMAC7.html)
ZA (1) ZA201503770B (cg-RX-API-DMAC7.html)

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