The determination of unsaponifiable matter in whale oil by the draft method of the Norwegian Standards Association

The Analyst ◽  
1938 ◽  
Vol 63 (750) ◽  
pp. 652 ◽  
Author(s):  
E. R. Bolton ◽  
K. A. Williams
Keyword(s):  
Unsaponifiable Matter ◽  
Whale Oil

The determination of the unsaponifiable matter of tall oil distillates

1958 ◽  
Vol 35 (3) ◽  
pp. 120-121 ◽  
Author(s):  
S. T. Bauer ◽  
R. E. Price ◽  
Patricia R. Gill
Keyword(s):  
Unsaponifiable Matter ◽  
Tall Oil

Alternate method for the determination of unsaponifiable matter

1968 ◽  
Vol 45 (7) ◽  
pp. 533-533 ◽  
Author(s):  
John T. Goghegan ◽  
Marius Rodson
Keyword(s):  
Unsaponifiable Matter

Application of Orthogonal Functions to the Spectrophotometric Determination of Calciferol in Oily Injections

1979 ◽  
Vol 62 (3) ◽  
pp. 545-548
Author(s):  
Sayed M Hassan
Keyword(s):  
Vitamin D ◽  
Spectrophotometric Determination ◽  
Unsaponifiable Matter ◽  
Orthogonal Functions

Abstract The method of orthogonal functions has been applied to the rapid spectrophotometric determination of vitamin D in oily injections. The method involves saponification of the sample and extraction of the unsaponifiable matter with ether. After cautious evaporation of ether, the residue is dissolved in isopropanol and the absorbance of the solution is measured in the range 246–296 nm at 10 nm intervals. For BPC injections, the saponification step may be omitted. A suitable dilution of the sample in isopropanol is measured in the range 250.5– 300.5 nm at 10 nm intervals. Accurate and precise results are obtained in both cases.

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