local fraction desolvated,
in flame emission and absorption spectrometry
The amount-of-substance fraction
of component in a desolvated state in the amount of component entering the flame.
This quantity is measured in a defined part of the flame, usually the observation
space. Because it varies with height in the flame as a result of progressive evaporation
droplets, it is appropriate to term the expression local. The fraction desolvated
does not account for losses by incomplete volatilization
of the dry aerosol
(which largely depends upon the nature and concentration of the component). Such
losses are described by local fraction volatilized, which usually depends on the solute.
varies markedly with the height in the flame, its observed value represents
an average. Local fraction desolvated depends on the solvent, the temperature of the
flame and the time the component takes to travel from the tip of the burner to the
height in the flame considered.
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