background equivalent concentration

symbol: $c_{\rm{BE}}$

https://doi.org/10.1351/goldbook.08459

Concentration of a given element measured at a given wavelength providing the same intensity as the background.

Source:
PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 714 (https://doi.org/10.1515/pac-2019-0203)