ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Pyrohydrolytic determination of fluorides. III. Optimum conditions of pyrohydrolysis

K. Matiašovský and C. Kubík

Slovak Academy of Sciences, Bratislava

Abstract: Various factors affecting the pyrohydrolytic detn. of F- in Al production and with TiO₂ as an activator are described. The condensate is titrated with 0.2N NaOH, with phenolphthalein or cresol red indicators. It is not necessary to under-layer or over-layer the sample with the activator. The sample wt. should be ≥0.1 g., and the wt. ratio of activator to sample should be ≤5:1. The flow of the H₂O vapor should be ≥5 g. H₂O/min. (about 200 cm./sec.). Under these conditions, the max. error is ±0.1% relative or 0.2% abs.

Full paper in Portable Document Format: 1611a808.pdf (in Slovak)

Chemical Papers 16 (11) 808–817 (1962)