FTIR spectroscopy (Bio-Rad Merlin Excalibur) was employed to
study surface changes of polystyrene films. Biodegradation
products were analyzed by High Pressure Liquid Chromatography
(Shimadzu). Standards used were 2-phenyl ethanol, 1-phenyl-1, 2-
ethanediol, Phenylacetaldehyde, Styrene oxide and Styrene (Sigma
Aldrich).