QUALITATIVE INFRARED ANALYSIS (QIA) – The infrared (IR) spectrum for each material is obtained by means of a Fourier-transform infrared (FTIR) spectrometer as described in the Infrared Spectroscopy sections of the Reference Standard for Electrical Wires, Cables, and Flexible Cords, UL 1581, or the Standard for Polymeric Materials – Short Term Property Evaluations, UL 746A.