DOI: 10.36347/sajp.2020.v09i01.003

Pages: 9-13

It is known that pharmacological action of a plant depends on time and temperature of extraction process. Recently we have noted anti solar activity of ethanol extract of Costus speciosus (C. speciosus) leaves of Sikkim Himalayas. Aim of the present work was to note effects of time and temperature of the extraction process on anti solar activity of C. speciosus leaves. C. speciosus leaves were collected from the local market and identified by the taxonomist. Ethanol extracts of the leaves were prepared for 15, 30, 45, 60, minutes at temperatures 30, 40, 50, 60 degree centigrade. Anti solar activity of different extracts was checked by a spectrophotometer taking absorption in UV region (200 – 400 nm). Results showed that ethanol extract of C. speciosus leaves of 15 minutes at 400 C showed maximum anti solar activity. These conditions may be maintained for isolation of the anti solar compound from C. speciosus leaves.