Fourier transform infrared spectroscopy is preferred over dispersive or filter methods of infrared spectral analysis for several reasons:
•It is a non-destructive technique
•It provides a precise measurement method which requires no external calibration
•It can increase speed, collecting a scan every second
•It can increase sensitivity – one second scans can be co-added together to ratio out random noise
•It has greater optical throughput
•It is mechanically simple with only one moving part