Determination of Oxygen in Some Minerals Using Pyrite

概要

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In the present paper a method for the determination of a very small amount of oxygen in an almost pure pyrite was proposed. From the results of the fundamental experiments on the reactions between the pyrite and the other minerals containing oxygen, it was ascertained that oxygen is completely liberated as sulfur dioxide and water vapor by heating in vacuo. The reproducibility of this method is fairly satisfactory, but there are no standard samples to examine the accuracy of this method. The results of the experiments indicate that this method could be used as a method for estimating the degree of oxidation of almost pure pyrites, for determining the amount of oxygen in some minerals, and in some cases for calculating the ratio of the oxygen containing compounds in their mixtures. Moreover, it seems possible to use this method for the determination of oxygen in a mixture of sulfides and oxides or sulfates of other metals than iron, and also oxygen in the metals. After the work reported herein had been almost completed, the authors were informed of the work, "The Sulfur Method of Oxygen Determination in Metals", of Babko et al. who reported a somewhat similar study on the determination of oxygen in metals by using elementary sulfur instead of pyrite.
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