Die Wasserbestimmung in Zellmaterial vonSaccharomyces cerevisiae nachKarl Fischer

Summary A method for the determination of wet and dry weight, has been developed which is adapted for small quantities of yeast. The wet yeast is prepared by a standardized suction filter method and titrated with Karl-Fischer solution. The dry matter content of yeast cells, harvested at daily intervals from growing cultures, changes in an increasing manner when the cultures becomes older. The values rise from about 20% to more than 30% dry matter from the second to the seventh day respectively.