non-specific emission or attenuation

https://doi.org/10.1351/goldbook.08511
Electromagnetic radiation, within the bandpass filter used, emitted by, or absorption caused by, atoms, molecules and radicals that are subject to the atomizer by all components, apart from the analyte, that are present there during measurement.
Note:
These effects include scattering or absorption effects by solid particles.
Source:
PAC, 2021, 93, 647. (Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)) on page 726 [Terms] [Paper]