Comparative Study of Microwave Assisted With Conventional Extraction of Calcium Sennosides from Senna Leaf

A calcium sennoside was extracted by developed microwave assisted extraction technique from Senna leaves. Microwave extraction was carried out at 250 W for 20 minutes, 350 W for 15 minutes and 450 W for 10 min heating period, these produced increase yields of calcium sennosides when compared to conventional heating. The yield of calcium sennosides obtained by microwave extraction was found to be 3.0 gm, 3.4 gm and 3.9 gm respectively, more than that obtained by conventional method .The microwave assisted extraction method reduced the amount of solvent consumed for the extraction purpose and also reduced the time of extraction. This was also aided due to the increased intensity of microwave power. The calcium sennoside products obtained by Microwave and conventional methods were same both physically and chemically. The method developed can be used mainly for routine laboratory scale isolation of calcium sennosides from Senna leaves.