Curcuma longa rhizomes are widely used by the traditional medical practitioners and researchers for curing and developing medicines for various diseases. This research study shows that what quantity of curcuma rhizomes can we extract with different solvents and co-solvents. Ash value determination of curcuma rhizomes with calculation of safety parameter for different values like extraction value, physicochemical and phytochemical parameters. Various tests for phytochemical study were performed as per the authenticated procedure and techniques in a qualified laboratory environment. There are multiple techniques like maceration, percolation, soxhlation etc. But I used Soxhlet extraction of curcuma powder. The solvents were n-hexane, ethyl acetate, acetone and alcohol.  The extraction value, ash value, oil contents were determined and a comparative study with help of charts and plots created with the researched values for better understandings. Antimicrobial activity of Curcuma extract was determined for gram-positive and gram-negative bacteria. Curcuma showed good inhibition zone against selected bacteria by agar well diffusion method. This research study will be helpful for development of new medicines and formulations.

Keywords: Curcuma Longa, Physicochemical, Phytochemical, Ash Value, Extraction.