ქიმიის ტერმინთა განმარტებითი ლექსიკონი

Measurement method of spectroscopy in which the absorbance, or other spectral ordinate, is differentiated n times with respect to wavenumber or frequency to give the nth derivative spectrum, i.e., the spectrum of the nth derivative of the original spectrum.

Note: The technique is used to transform changes of slope in the original spectrum into more prominent features in the derivative spectra and is extensively used in the near-infrared to flatten spectral baselines to improve subsequent chemometric study.