Published March 31, 1977 | Version v1
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A rapid method for the determination on fluoride in geological samples

Creators

Description

An account is given of a rapid procedure for the determination by use of the specific-ion electrode of fluoride in geological samples. The sample is fused with sodium hydroxide in a nickel crucible in a muffle furnace. The melt is leached with water, a buffer solution of ammonium citrate is added, and the fluoride activity is measured with a specific-ion electrode. All operations are carried out in the crucible, making possible approximately 100 determinations a day. The precision of the method is approximately 10 per cent at a fluoride concentration of 500 p.p.m., which is acceptable for geological-survey work

Availability note (English)

MF available from INIS under the Report Number.

Abstract (Afrikaans)

Daar word verslag gedoen oor 'n vinnige prosedure vir die bepaling van fluoried in geologiese monsters met gebruik van die spesifieke-ioonelektrode. Die monster word met natriumhidroksied in 'n nikkelkroesie in 'n moffeloond gesmelt. Die smeltsel word met water uitgeloog, 'n bufferoplossing van ammoniumsitraat bygevoeg en die fluoriedaktiwiteit met 'n spesifieke-ioonelektrode gemeet. Alle bewerkings word in die kroesie uitgevoer sodat daar ongeveer 100 bepalings per dag gedoen kan word. Die presisie van die metode is ongeveer 10 persent met 'n fluoriedkonsentrasie van 500 d.p.m. wat aanvaarbaar is vir geologiese-opnamewerk

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Additional details

Publishing Information

ISBN
0 86999 376 3
Imprint Pagination
8 p.
Report number
NIM--1886

INIS

Country of Publication
South Africa
Country of Input or Organization
South Africa
INIS RN
8334187
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
CALIBRATION; CHEMICAL ANALYSIS; EDTA; ELECTRODES; FLUORIDES; GEOLOGIC SURVEYS; LEACHING; MELTING; SAMPLING; SODIUM HYDROXIDES
Descriptors DEC
ALKALI METAL COMPOUNDS; AMINO ACIDS; CARBOXYLIC ACIDS; CHELATING AGENTS; DISSOLUTION; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; HYDROGEN COMPOUNDS; HYDROXIDES; ORGANIC ACIDS; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; SEPARATION PROCESSES; SODIUM COMPOUNDS