Abstract
A method for the determination of samarium, europium, gadolinium, dysprosium, holmium and yttrium oxides in terbium oxide is described. The sample is converted to terbium oxalate, mixed with boric acid binder in the ratio 2∶1, pelleted at a pressure of 20 tons over a boric acid backing pellet and irradiated with X-rays from a tungsten tube operated by Philips PW 1140 generator. The secondary X-rays thus generated are analysed by a LiF(200) crystal in Philips PW 1220 X-ray fluorescence spectrometer. The minimum determination limit is 0.01% for all rare earth oxides determined except for yttrium oxide for which it is 0.005%.
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