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Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 24,
  • Issue 1,
  • pp. 103-105
  • (1970)

Point-to-Plane Determination of Magnesium in Ductile Iron

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Abstract

Difficulty had been encountered in the determination of magnesium in ductile iron by point to plane methods because tiny eruptions in the burn caused irregularities and non-reproducible results on the vacuum spectrometer. Investigation showed that magnesium sulfide, formed from treatment magnesium and residual sulfur, floating slowly upward, was the probable cause. A teaspout ladle was used and, after pouring the molten iron into a can-like hand ladle lined with fireclay for the sample, gave iron free of these defects.

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