102 © Copyright and review are related to the steering committee of ICRASS 2016 Spectral and Phytochemical Analysis on the Extraction of Decalepis hamiltonii S. Selvaraj, P. Rajkumar, K. Thirunavukkarasu, A. Santhiya, S. Kumaresan * Spectrophysics Research Laboratory, PG and Research Department of Physics, Arignar Anna Government Arts College, Cheyyar - 604407, Tamil Nadu, India * Corresponding author’s E-mail: yeskay72@gmail.com Abstract In this study, the chemical constituents of Decalepis Hamiltonii have been evaluated using FTIR, UV-Vis and GC-MS Spectroscopic methods. The FTIR spectrum identified the presence of functional groups in the methanolic extracts. The UV-Vis spectrum showed different peaks ranging from 200-400 nm with different absorption respectively. Preliminary phytochemical studies were shown the presence of flavonoids, saponins, tannins, phenols, carbohydrates and amino acids. The results of GC-MS analysis revealed the presence of 10 bioactive compounds with different therapeutic activities. The major phytoconstituent was (i) 2- Furancarboxaldehyde,5-(Hydroxymethyl) (15.711%), (ii) Benzaldehyde,2-Hydroxy-4-Methoxy (6.650%), (iii)4-Ethyl-2- Hydroxycyclopent-2-En-1-One (5.377%), (iv) 2-Undecene, 5-Methyl (20.362%), (v) Beta.-D-Mannofuranoside, Methyl (27.425%), (vi) Octadecanoic Acid (7.575%), (vii) D-Glycero-L-Gluco-Heptose (8.611%). This plant is considered as a valuable source of unique natural products for development of medicines against various diseases and also for the development of industrial products. Keywords FTIR, UV, GC-MS, Soxhlet extraction, Phytochemical analysis.