Results obtained with the use of the smoke precipitator.

Abstract

Heretofore we have experienced some difficulty when precipitating smoke in determining iodin by McClendon's method. The results of smoke precipitation, the theory of which Dr. McClendon has explained, show that the deficiency of the precipitator is in inverse ratio to the amount of smoke given off. When the volume is small the efficiency is around 90 per cent, but when the volume of smoke which passes through is great, it probably does not stop more than one-half of an efficiency of about 50 per cent. Therefore, the average efficiency that has been obtained in all of the determinations would average about 66 per cent.