IMPROVED METHODS FOR FAT ANALYSIS. 



119 



Neutralization N timber of Insoluble Fatty Acids. 



Acid. 



Formula. 



Molecular 

 Weight. 



Neutraliza- 

 tion 

 Number. 



Laurie, . . 



Myristic, 



Palmitic, 



Stearic, . 



Arachic, 



Oleic, . 



Erucic, . 



Linolic, 



Linolenic, 



Clupanodonic, 



Ricinoleic, 



Dihydroxystearic, 



C11H23COOH 



C13H27COOH 



C15H31COOH 



CnHsoCOOH 



CisHsoCOOH 



C17H33COOH 



C21H41COOH 



CnHsiCOOH 



C17H29COOH 



C17H27COOH 



C17H32.OH.COOH 



Ci7H33(OH)2COOH 



200.192 



228.224 

 256.256 

 284.288 

 312.320 

 282.272 

 338.336 

 280.256 

 278.240 

 276.224 

 298.272 

 316.288 



280.271 

 245.846 

 218.953 

 197.363 

 179.649 

 198.773 

 165.835 

 200.203 

 201.653 

 203.125 

 188.110 

 177.395 



Glycerides of Insoluble Fatty Acids. — The percentage of triglycerides 

 (Ig) can be calculated from the percentage (I) and molecular weight (m) 

 of the insoluble fatty acids by the formula — 



Ig = 3 m +38.01 6 ^ j 

 3 m 



Glycerol in the Glycerides of Insoluble Acids. — The percentage of glycerol 

 (G) in the glycerides of insoluble acids can be calculated from the per- 

 centage (I) and molecular weight (m) of the insoluble acids : — 



G = 



92.064 

 3m 



XI 



See derivation of formula (14) and table "Percentage of Fatty Acids 

 and Glycerol in Triglycerides." 



Mean Molecular Weight and Saponification Number of the Glycerides of 

 Insoluble Acids. — The mean molecular weight (mi) and saponification 

 number (si) of the glycerides of the insoluble acids can be calculated 

 from the molecular weight (m) of the insoluble acids : — 



irn= 3 m+ 38.016 

 „ _ 3X56108 



See table ''Saponification Number of Triglycerides." 



