342 The Philippine Journal of Science 192s 



The percentage of unsaturated acids, separated by the lead- 

 salt-ether method, corrected for unsaponifiable matter and for the 

 amount of unsaturated acids present in the saturated acids, was 

 76.94 (Table 3), which is equivalent to 80.40 per cent of oleic 

 glyceride originally present in the oil. The data obtained by 

 the analysis of the bromo-derivatives and a summary of the 

 calculated results are given in Table 4. 



Table 4. — Analysis of unsaturated acids (bromo-derivative method)* 



Unsaponifiable m 



saturated acids and t 

 Pure unsaturated acid 



saturated acids and 

 Linolenic hexabromide insoluble in ether 

 Linolic tetrabromide insoluble in petroleum 



ether 

 Impure residue (brominated unsaturated 



acids and brominated unsaponifiable 



matter) determined 2.0841 



Brominated unsaponifiable matter in impure 



residue (calculated) 0.0559 



Unsaponifiable matter in sample of impure 



residue (0.5368 gram) used for bromide 



analysis 0.0144 . 



Bromine in the unsaponifiable matter (iodine 



No. 94.55) contained in sample of residue 



bromide, 0.4630 gram) 0.1970 36.70 



Bromine in pure brominated unsaturated 



acids contained in sample of impure residue 



analyzed 0>1884 



Bromine in pure brominated unsaturated 



acids contained in total impure residue 0.7314 



Pure brominated unsaturated acids (bromine 



content, 36.06 per cent) in total impure 



Oleic acid equivalent to dibromide 1.2940 

 Unsaturated acids separated by lead-salt- 

 ether method (corrected) 76.94 



Oleic glyceride in oil on 4 n 



The calculated iodine value of the mixture of unsaturated 

 acids and unsaponifiable matter is 90.19, which agrees fairlv 

 well with the determined value, 94.18 (Table 3) . 



