The Philippine Journal of Science 



Unsaponifiable matter (calculated) in the total deter- 

 mined percentage of saturated acids, unsaturated 

 acids, and unsaponifiable matter (95.41) 



Pure unsaturated acids corrected for unsaponifiable 



aturated acids present ] 



ure saturated 



6.57 

 Pure saturated acids corrected for unsaturated acids 



(calculated) 16 ' 53 



Pure unsaturated acids corrected for unsaponifiable 

 matter and for the unsaturated acids present in the 

 saturated acids 76.94 



The percentage of unsaponifiable matter (1.47, Table 2) ori- 

 ginally present in the oil is equivalent to 1.94 per cent in the 

 total percentage (95.41, Table 3) of the impure saturated acids, 

 unsaturated acids, and unsaponifiable matter: 

 (72.31 -f 23.10) X 1.47 _ . QA 

 72.31 " i ' y - 



The percentage of pure unsaturated acids corrected for unsa- 

 ponifiable matter is, therefore, 70.37 : 



95.41 -(23.10 + 1.94)= 70.37. 

 The impure saturated acids separated by the lead-salt-ether 

 method had an iodine value of 26.79. The unsaturated acids 

 present as contamination in the impure saturated acids was 6.57 

 per cent: 



23.10 X 26.79 



94^8"— = 6 ' 57 ' 



The percentage of pure saturated acids was 23.10 — 6.57, or 

 16.53. The percentage of the total pure unsaturated acids cor- 

 rected for unsaponifiable matter and for the unsaturated acids 

 (6.57 per cent) which were present as contamination in the 

 impure saturated acids was 70.37 + 6.57, or 76.94. 



UNSATURATED ACIDS 



The impure unsaturated acids separated by the lead-salt-ether 

 method were determined by means of the bromo-derivative 

 method, which is used to separate the various unsaturated acids 

 from each other. The sample of unsaturated acids and 

 unsaponifiable matter (1.3172 grams) used for preparing the 

 bromo-derivatives consisted of 0.0353 gram of unsaponifiable 

 matter and 1.2819 grams of pure unsaturated acids. The bro- 



