Substance added together with the sample or standards in
electrothermal atomic absorption spectroscopy that is refractory, or forms a refractory species (e.g., a carbide), and thus does not need to be renewed for several atomization cycles.
Note:
This is a particular type of chemical modifier for electrothermal AAS.
Source:
PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 727 (https://doi.org/10.1515/pac-2019-0203)