Preferred Label : local fraction desolvated;
Detailed label : local fraction desolvated in flame emission and absorption spectrometry, χs, βs;
IUPAC definition : 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 of aerosol 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. Since χ s 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.;
Origin ID : L03605;
See also
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 of aerosol 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. Since χ s 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.
