Chemical technology and analysis of oils, fats and waxes / by Dr. J. Lewkowitsch.

  • Julius Lewkowitsch
Date:
1914
Catalogue details

Licence: In copyright

Credit: Chemical technology and analysis of oils, fats and waxes / by Dr. J. Lewkowitsch. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    pale yellow, optically inactive oil. Tlie following characteristics were ascertained:— Hooper. Grimakli and Prussifi. Power and Moore. OjT— • Specific gravity at 15° C. . 0-9289 „ „ at 20° C. . V to (water at 20° C. = l) Specific gravity at 100° C.. 0-8733 • • (water at 15° C. = l) Solidifying point .... -14.° r Saponification value . 2d2-9 191-7 186-7 Iodine value .... 129-3 120-4 126-6 Reichert-Meissl value . Butyro-refractometer— * • degrees at 15° C. 78-2 „ at 25° C. 72-3 ■ ' at40°C. 63-5 Maumene test (in Tortelli's apparatus) .... 86-4 Fatty Acids— Insoluble acids -(- unsaponifiable 92-2 DPr ppnt Qn-79 T\pv ppnf Specific gravity at 50° C. . 0-8910 (water at 50° C. = l) Specific gravity at 100° C.. (water at 15° C. = l) Solidifying point .... 2Q° ftitpr^ 9R-9 97-9 Melting point .... 29-2-30 Neutralisation value . 192-6 Saponification value . 198-2 Iodine value .... 121 131-i Iodine value of liquid fatty acids 150 Liquid fatty acids 56-2 per cent Sofid fatty acids .... 43-8 „ But jTO -ref ractometer—■ degrees at 30° C. 56-7 at 40° C. 51-5 at 45° C. 48-3 Poiver and Moore isolated from the oil a phytosterol C20H34O melting at 159°-160° (acetate melting at 167°-170°) having [a]D= +8-1°. The Algerian oil absorbed in Livache's test, after 3 days 5-22 per cent, and after 7 days 5-76 per cent, of oxygen. The acid value of the Baluchistan oil was 5-9 and that of the Algerian oil 2-7. IKPAN SEED OIL ^ French—Huile cl'ikpan. German—Ikpansamendl. Italian—Olio di semi di ikpan. This oil is obtained from the ikpan seeds of Southern Nigeria, which are probably derived fi'om one of the forms of water melon, • Bull. Imp. Inst., 1907, 132, 133 ; 1908, 356. VOL. II M