Collaborative study of a method for the extraction of light filth from ground turmeric.

An improved method has been developed for the extraction of light filth from ground turmeric. The method involves an isopropanol defatting followed by a direct flotation from 40% isopropanol with Tween 80-EDTA (1+1) and hot mineral oil. Collaborative results show that the method is rapid and yields better filth recoveries than the official first action method, 44.118. The method has been adopted as official first action to replace 44.118.