Rapid general microdetermination of fluorine
article
A rapid micromethod for the determination of fluorine in a wide variety of materials has been developed. The method is based on the liberation of the fluorine (as HF) from the sample by means of pyrohydrolysis with steam at 1120?? C, The amount of fluoride in the condensate is subsequently measured with an ion-selective electrode using a simple standard addition technique, which automatically compensates for variations in ionic strength, acidity, etc. Metals that may form stable complexes with fluoride are masked by the addition of a complexing agent to the condensate. Materials analysed included refractory compounds such as the fluorides of the alkaline earth metals, organic and organo-metallic compounds, alumina-base catalysts, anthropological samples, coal, etc. Limit of detection is of the order of 1 ??g F; standard deviation is about 1% relative. Time required for one determination is 15-20 min. ?? 1979 Springer-Verlag.
TNO Identifier
228624
ISSN
00161152
Source
Fresenius' Zeitschrift f??r Analytische Chemie, 296(1), pp. 36-39.
Publisher
Springer-Verlag
Pages
36-39
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