GB917882A - Improvements relating to the testing of water for ph - Google Patents

Improvements relating to the testing of water for ph

Info

Publication number
GB917882A
GB917882A GB2717461A GB2717461A GB917882A GB 917882 A GB917882 A GB 917882A GB 2717461 A GB2717461 A GB 2717461A GB 2717461 A GB2717461 A GB 2717461A GB 917882 A GB917882 A GB 917882A
Authority
GB
United Kingdom
Prior art keywords
red
purple
indicator
testing
blue
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
GB2717461A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2717461A priority Critical patent/GB917882A/en
Publication of GB917882A publication Critical patent/GB917882A/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 method of testing the pH of water containing an oxidizing agent comprises addition of reducing agent to the water before or with the pH indicator, to which reducing agent acid or alkali has been added to adjust the pH of its solution to or approximately that of the mid-point of the pH range of the particular indicator. Embodiments use as indicators cresol red, cresol purple, thymol blue, bromophenol blue, bromocresol green, methyl red, chlorophenol red, bromocresol purple, bromothymol blue, phenol red or diphenol purple. Reducing agents used are thiosulphates, arsenites or sulphite. Indicator and reducing agents may be premixed in solution, powder or tablet form.
GB2717461A 1961-07-27 1961-07-27 Improvements relating to the testing of water for ph Expired GB917882A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2717461A GB917882A (en) 1961-07-27 1961-07-27 Improvements relating to the testing of water for ph

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2717461A GB917882A (en) 1961-07-27 1961-07-27 Improvements relating to the testing of water for ph

Publications (1)

Publication Number Publication Date
GB917882A true GB917882A (en) 1963-02-06

Family

ID=10255402

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2717461A Expired GB917882A (en) 1961-07-27 1961-07-27 Improvements relating to the testing of water for ph

Country Status (1)

Country Link
GB (1) GB917882A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7326383B2 (en) 2003-12-11 2008-02-05 Taylor Technologies, Inc. Reagent, apparatus and method for measuring cyanuric acid
US11162840B1 (en) 2021-04-20 2021-11-02 Giftedness And Creativity Company Method and kit for detecting technetium-99m radioisotopes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7326383B2 (en) 2003-12-11 2008-02-05 Taylor Technologies, Inc. Reagent, apparatus and method for measuring cyanuric acid
US11162840B1 (en) 2021-04-20 2021-11-02 Giftedness And Creativity Company Method and kit for detecting technetium-99m radioisotopes

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