Page 178 - Pharmaceutical Analytical Chemistry III
P. 178
Significance
It is a measure of FA chain length
SPV is inversely proportional to mean Mw of FA, i.e. low
Mw FAs require high amount of KOH for their
saponification
To detect presence of glycerides of low Mw FAs, e.g. butter fat, SPV ~ 250
To detect adulteration with paraffin oil "Unsaponifiable oil" → very low
SPV
177
