Abstract

About 4 mg of rock powder measured with a scoop is fused with potassium bisulfate in a test tube. Tiron is added to the cool melt and the mixture is dissolved in a buffer solution. Sodium dithionite is added and the approximate concentration of TiO 2 is determined by comparing the resulting yellow solution with permanent standards, which are simple to prepare.The results obtained by this field method for TiO 2 on 72 rock samples of various types are compared with those obtained by laboratory methods.

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