The volume rate of one component,
X (e.g. air,
O2 ), of the unburnt gas mixture (such as
C2H2,
O2, etc.) in the burner tip. Ambient temperature and pressure must be stated.
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 1742 (https://doi.org/10.1351/pac198658121737)