Abstract
A colorimetric method of determining micro-quantities of silicon in steels was studied with the Pulfrich’s photometers, whith was carried out in presence of iron, eliminating its interferences by an addition of fluoride. As little as 0.01% of silicon in steels is determinable by this method within about ten minutes, and also some permanent colorimetric standard solutions of this yellow color have been prepared in order to make possible the colorimetric determination by means of some usual colorimeter.
