total consumption time, \(t_{\textrm{tot}}\)

in flame emission and absorption spectrometry
https://doi.org/10.1351/goldbook.T06409
The time necessary to consume the prepared sample completely (in \(\mathrm{s}\)). It is equal to the volume of the prepared sample divided by the rate of fluid consumption.
Source:
PAC, 1986, 58, 1737. (Quantities and units in clinical chemistry: Nebulizer and flame properties in flame emission and absorption spectrometry (Recommendations 1986)) on page 1740 [Terms] [Paper]