Determination of Oxygen in Ferrosilicon by Argon-Carrier Fusion with Tin-Carbon Powder Bath

概要

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Determination of oxygen in ferrosilicon was attempted by the argon-carrier fusion method, using carbon powder wrapped in tin foil as a bath. With the powder sample, an unreasonably higher value was obtained than a mean value of real and original oxygen contents because the oxygen contained in the surface contributes to the measured value more dominantly with the increase in surface area. For an accurate analysis of the block sample, it is essential to obtain a mean value of oxygen contents by sampling from many parts of the block sample as possible, or, at least, from the upper, middle, and lower layers of the sample, though, in the latter case, it is required to specify the sampling position with the analytical result. By the proposed method, the complete reduction of oxides is accomplished with a block sample and the determination of oxygen can be repeated with several samples for each bath.
東北大学の論文