spectrometry

The measurement of wave-lengths by means of a spectrometer.

Art or process of using a spectrometer, of any type; — when used alone, it usually refers to the use of a spectrometer using light in the visible, infrared, or ultraviolet region.

the art or process of using a mass spectrometer to analyse chemical samples.

The measurement of the wavelength of electromagnetic radiation, especially any of several techniques used to analyze the structure of molecules; the measurement of spectra of things other than radiation, such as the masses of molecules and their breakdown products

the use of spectroscopes to analyze spectra