Measurement of quantities related to
electromagnetic radiation or charged particles as a means of obtaining information about a system and its components.
Examples: Electron emission spectrometry, mass spectrometry.
Source:
PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 649 (https://doi.org/10.1515/pac-2019-0203)