Determination of Fluorine in Basic Slag. (Study on the chemical analysis of basic slag-V) Shigeo Wakamatsu Synopsis: This investigation was undertaken to find rapid and accurate chemical methods for the analysis of basic slag. In the report (V), a simple combustion procedure and an indirect volumetric method were described for the determination of fluorine in basic slag.

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Synopsis:A simple chelatometric titration method for the determination of zinc in steel making dust has been developed.Zinc form negatively charged chloride complex which is adsorbed by the strongly basic anion exchange resin. Maximum adsorption of zinc is obtained in 2N HCl. In this medium most elements with which zinc are associated in dust are not adsorbed by the resin. It is therefore possible to separate zinc from iron, aluminium, manganese, calcium, magnesium, chromium and nickel.Zinic is then eluted from the resin with 0.3N HNO3, and titrated with EDTA using EBT as the indicator. Part of iron, copper, tin, lead and arsenic are adsorbed on the resin, but a subsequent EDTA titration procedure is described which obviates their interference.The proposed has the advantage of speed, yet has the same accuracy as the gravimetric method.

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