Tobacco and makhorka (Ntkotiana rustica) as material for the extraction of citric acid. A. Schmuck. SUMMARY. In the present paper the author is considering tobacco and makhorka as material for the practical extraction of citric acid. The content of citric acid in makhorka is often reaching as high as 10—ll°/0. Its mean content is 6 — 7% and it seldom falls below 5°/0. (The mean content in lemons is 3,5°/o—5,0°/o). This circumstance has suggested to the author the idea to use makhorka for the extraction of citric acid. Different methods of extraction have been tried by the author, some of which gave good results and have been tested on a large scale. Электронная Научная Сельскохозяйственная Библиотека