GB1006908A - Improvements relating to the testing of water for flouride - Google Patents

Improvements relating to the testing of water for flouride

Info

Publication number
GB1006908A
GB1006908A GB4355562A GB4355562A GB1006908A GB 1006908 A GB1006908 A GB 1006908A GB 4355562 A GB4355562 A GB 4355562A GB 4355562 A GB4355562 A GB 4355562A GB 1006908 A GB1006908 A GB 1006908A
Authority
GB
United Kingdom
Prior art keywords
mixture
sample
water
fluoride
ammonium
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
GB4355562A
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 GB4355562A priority Critical patent/GB1006908A/en
Priority to DE19631498948 priority patent/DE1498948A1/en
Publication of GB1006908A publication Critical patent/GB1006908A/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

Abstract

The fluoride content of a sample of water is estimated by colorimetric techniques after the addition to the sample of a mixture, in solid form, comprising a metal salt and a dye reacting therewith to form a fluoride sensitive lake. The salt may be zirconium oxychloride, thorium nitrate, aluminium ammonium sulphate or a compound of ferric iron, cerium or lanthanum. The dye may be alizarin red S, aluminon, eriochrome cyanine R, xylenol orange, haematoxylin, ammonium aurine tricarboxylate, purpurin sulphonate, solochrome violet RS, 1-(o-arsenophenylazo)-2-naphthol-3:6-disulphonic acid or 4,5-dihydroxy-3-(parasulphophenylazo)-2,7-naphthalene-disulphonic acid trisodium salt. The mixture may also contain a compound, such as sodium bisulphate, sulphamic acid or potassium hydrogen phthalate, which serves to swamp and hence blanket the effect of any natural sulphate in the sample, and an additional acidifying agent. The mixture is used in tablet or capsule form and may contain fillers, lubricants and disintegrants. A predetermined proportion of mixture in the sample water achieves a colour which is examined by a spectrophotometer or compared visually with standards. Standards may be coloured glasses or solutions, prepared by adding identical quantities of mixture to distilled water or to samples of water taken before fluoridation, together with standard quantities of soluble sodium fluoride or ammonium fluoride, preferably used in tablet form. Reference has been directed by the Comptroller to Specification 902,884.
GB4355562A 1962-11-17 1962-11-17 Improvements relating to the testing of water for flouride Expired GB1006908A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB4355562A GB1006908A (en) 1962-11-17 1962-11-17 Improvements relating to the testing of water for flouride
DE19631498948 DE1498948A1 (en) 1962-11-17 1963-11-18 Reagent and method for determining the fluorine content of water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4355562A GB1006908A (en) 1962-11-17 1962-11-17 Improvements relating to the testing of water for flouride

Publications (1)

Publication Number Publication Date
GB1006908A true GB1006908A (en) 1965-10-06

Family

ID=10429278

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4355562A Expired GB1006908A (en) 1962-11-17 1962-11-17 Improvements relating to the testing of water for flouride

Country Status (2)

Country Link
DE (1) DE1498948A1 (en)
GB (1) GB1006908A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005098418A1 (en) * 2004-04-12 2005-10-20 Secretary, Department Of Atomic Energy A novel visual colorimetric reagent for the rapid estimation of fluoride in ground water

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008018180A1 (en) * 2008-04-02 2009-10-15 Hansgrohe Ag Method for quantitative detection of perfluorinated surfactant e.g. perfluorinated alkylsulfonate contained in sewage sludge, involves determining interaction product formed by mixing perfluorinated surfactants and chromophore
DE102011007799A1 (en) * 2011-04-20 2012-10-25 Hansgrohe Ag Method for the detection of partially fluorinated surfactants

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005098418A1 (en) * 2004-04-12 2005-10-20 Secretary, Department Of Atomic Energy A novel visual colorimetric reagent for the rapid estimation of fluoride in ground water

Also Published As

Publication number Publication date
DE1498948A1 (en) 1969-03-13

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