THE POTENTIOMETRIC DETERMINATION OF FLUORIDE WITH LANTHANUM NITRATE AND ITS APPLICATION TO THE MICRO-DETERMINATION OF FLUORINE IN ORGANIC COMPOUNDS.

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Abstract:

The unbuffered fluoride solution is adjusted to pH 6.3 and titrated with 0.05N lanthanum nitrate solution. A rapid decrease in pH at the end-point, due to hydrolysis of the excess of lanthanum ions, is followed with a quinhydrone indicatorcalomel reference electrode system. Sulphate, phosphate, carbonate and silicate ions interfere. Methods for removal of all but the first of these are described. The method has been applied to the determination of fluorine in organic compounds. Results were within 0.5 absolute. Author

Author(s):
Cheesman, B. F. ; Webb, J. R.
Author Organization(s):
ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (ENGLAND)
Descriptive Note:
Technical rept.,
Pagination:
0017

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TR-66340
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*FLUORIDES, *HALOGENATED HYDROCARBONS, *MICROANALYSIS, QUANTITATIVE ANALYSIS, ELECTROCHEMISTRY, LANTHANUM COMPOUNDS, NITRATES, IMPURITIES, PHOSPHATES, SILICATES, CARBONATES, UNITED KINGDOM
Field(s)/Group(s):
Inorganic Chemistry, Organic Chemistry, Physical Chemistry
Keyword(s):
POTENTIOMETRIC TITRATION
Report Date:
1966 Oct 01