Analysis of active pharmaceutical ingredients by terahertz spectroscopy

Spectra of solid state active pharmaceutical ingredients obtained by Terahertz (THz) Time Domain Spectrometer in terahertz region of electromagnetic spectrum are presented. Each sample showed unique spectral features in 10.0-90.0 cm(-1) indicating the potential use of THz spectroscopy for identification and quantification of drugs. Spectroscopic information of drugs would be needed in near future when THz technology further develops for on-site analysis and characterisation.