GB922606A - ªÐh indicator - Google Patents

ªÐh indicator

Info

Publication number
GB922606A
GB922606A GB13343/61A GB1334361A GB922606A GB 922606 A GB922606 A GB 922606A GB 13343/61 A GB13343/61 A GB 13343/61A GB 1334361 A GB1334361 A GB 1334361A GB 922606 A GB922606 A GB 922606A
Authority
GB
United Kingdom
Prior art keywords
polyvinyl alcohol
bibulous material
indicator
red
aðh
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
GB13343/61A
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.)
Bayer Corp
Original Assignee
Miles Laboratories Inc
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 Miles Laboratories Inc filed Critical Miles Laboratories Inc
Publication of GB922606A publication Critical patent/GB922606A/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
    • G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
    • G01N31/22—Investigating 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
    • G01N31/221—Investigating 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

Abstract

A pH test indicator comprises a white, neutral, bibulous material carrying a mixture of a pH indicator dye and polyvinyl alcohol. Specified dyes are bromocresol purple, chlorphenol red and in combination methyl red and bromthymol blue. The polyvinyl alcohol component may be an incompletely hydrolysed polyvinyl acetate containing 1-15% of the acetate. Preferably a surface active compound, e.g. polyoxyethylene sorbitan monolaurate is also present. The bibulous material may comprise filter paper or cardboard strips or powdered cellulose tablets. Specification 867,192 is referred to.
GB13343/61A 1960-04-18 1961-04-13 ªÐh indicator Expired GB922606A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22699A US3146070A (en) 1960-04-18 1960-04-18 ph indicator unit

Publications (1)

Publication Number Publication Date
GB922606A true GB922606A (en) 1963-04-03

Family

ID=21810968

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13343/61A Expired GB922606A (en) 1960-04-18 1961-04-13 ªÐh indicator

Country Status (2)

Country Link
US (1) US3146070A (en)
GB (1) GB922606A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3528780A (en) * 1968-04-05 1970-09-15 Us Air Force Visual ammonia detector
US4353708A (en) * 1978-07-13 1982-10-12 L'oreal Evaluation of the state of change of keratin fibers
NL1004646C2 (en) * 1996-11-29 1998-06-03 Buchem Holding B V Means for determining the acidity of a cat's urine.

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3438737A (en) * 1965-10-01 1969-04-15 Miles Lab Protein test composition,device and method
US3544484A (en) * 1967-12-18 1970-12-01 American Standard Inc Optical ph indicator comprising aromatic aminoazo dye and inert polymer containing carbonyl radicals
BE795221A (en) * 1972-02-12 1973-08-09 Merck Patent Gmbh QUICK PROCESS AND REAGENT FOR DETECTION OF NARCOTIC DRUGS
US4050898A (en) * 1976-04-26 1977-09-27 Eastman Kodak Company Integral analytical element
US4822743A (en) * 1984-12-13 1989-04-18 Lockheed Corporation Method and cloth for detecting leaks in closed bodies
US6468805B1 (en) * 1990-10-10 2002-10-22 Chimera Research And Chemical Inc. Automated analyzer testing of urine for presence of a pH abnormality
US5801060A (en) * 1990-10-10 1998-09-01 Chimera Research & Chemical, Inc. Method of using automated analyzer testing of urine for presence of a pH abnormality with single reagent indicator
US5660790A (en) * 1996-08-13 1997-08-26 Litmus Concepts, Inc. PH and amine test elements
GB2408330B (en) * 2003-11-22 2008-12-03 Advanced Gel Technology Ltd Polymeric materials comprising pH indicators for use in wound dressings
US20080223413A1 (en) * 2007-03-14 2008-09-18 Radford Philip T Color changing soap
US9131893B2 (en) 2012-10-26 2015-09-15 Pixie Scientific, Llc Health diagnostic systems and methods
CN104076028A (en) * 2013-03-30 2014-10-01 天津市食品加工工程中心 CO2 sensitive type indicator label manufacturing method
US10383564B2 (en) 2015-05-22 2019-08-20 Pixie Scientific, Llc Indicator panels for incontinence products

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH268318A (en) * 1946-04-26 1950-05-15 Tripet Roger Rapid method for detecting the pH of the skin and device for its implementation.
US2567445A (en) * 1946-08-21 1951-09-11 Elizabeth W Parker Method of measuring the ph of aqueous liquids, moist foodstuffs, and the like
US2643230A (en) * 1950-09-12 1953-06-23 American Cyanamid Co Universal ph indicator
US2770530A (en) * 1953-09-08 1956-11-13 Shell Dev Method of oil testing and composition therefor
US2915373A (en) * 1959-07-20 1959-12-01 Wenker Henry Indicator papers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3528780A (en) * 1968-04-05 1970-09-15 Us Air Force Visual ammonia detector
US4353708A (en) * 1978-07-13 1982-10-12 L'oreal Evaluation of the state of change of keratin fibers
NL1004646C2 (en) * 1996-11-29 1998-06-03 Buchem Holding B V Means for determining the acidity of a cat's urine.
WO1998023966A1 (en) * 1996-11-29 1998-06-04 Buchem Holding B.V. Means for determining the degree of acidity of the urine of a cat

Also Published As

Publication number Publication date
US3146070A (en) 1964-08-25

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