## appearance temperature, $$T_{\text{app}}$$

in electrothermal atomization
https://doi.org/10.1351/goldbook.A00423
The temperature of the atomization surface at which the analyte signal/@[email protected] (S/N) ratio reaches a value of 3 when the quantity of analyte in the atomizer is one hundred times the characteristic mass for peak high absorption.
Source:
PAC, 1992, 64, 253. (Nomenclature, symbols, units and their usage in spectrochemical analysis - XII. Terms related to electrothermal atomization (IUPAC Recommendations 1992)) on page 257 [Terms] [Paper]