IMPROVED METHODS FOR FAT ANALYSIS. 



131 



The derivation of^^the formula is comparatively simple. The theoretical 

 acetj'l number of a^compound containing d hydroxj'l groups is : — 



56108 d 



The amount of such a compound in an oil, fat or wax is therefore — 



56108 d 



56108 d 



The same results may be calculated more easily from the following table 

 dividing the determined acetyl number by the theoretical acetyl number, or 

 multiplying by its reciprocal : — 



Acetyl Number on Original Product. 

 Glycerides. 



Monoglycerides. 



Diglycerides. 



Hydroxy Acids. 



Ricinoleic, 

 Dihydroxystearic, 



Ci7H83.OH.COOH 

 Ci7H33(OH)2COOH 



298.272 

 316.288 



188.110 

 177.395 



188.110 

 354.791 



.0053160 

 .0028186 



Free Alcohols. 



Sitosterol, . 

 Cholesterol, 



C27H«OH 

 C27H«OH 



386.368 

 386.368 



145.219 

 145.219 



.0068862 

 .0068862 



