The fluorimetric determination of zirconium as 8-hydroxyquinolinate in the presence of titanium, tungsten and molybdenum

Abstract

A fluorimetric method is described for the determination of small amounts of zirconium as 8-hydroxyquinolinate. The procedure, which involves extraction of the chelate with chloroform from a hydrofluoric acid-ammonium tartrate solution at pH 9·0, permits the determination of zirconium in the presence of titanium, tungsten and molybdenum.

Excitation is conducted at 398 nm and emission measured at 520 nm. Down to 0·1 µg of zirconium can be determined with a coefficient of variation of 2·3 per cent.