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)

    123/980 (page 103)
    ARBUTE SEED OIL LINARIA OIL ARBUTE SEED OIL—ARBUTUS UNEDO OIL ^ French—Huile d'arbouse. German—Sandbeerendl. Italian—Olio di corbezzola. The fruits of Arbutus unedo are used (near Perugia) for the com- mercial production of alcohol. The fatty oil constituting 39-03 per cent of the seeds is retained in the still residue. The insoluble fatty acids (including the unsaponifiable matter) amount to 92-6 per cent. They consist of palmitic, oleic, linolic, and isolinolenic acids, the two latter predominating. The quantitative examination of the fatty acids carried out according to Hazura's method is stated to have yielded 3-43 per cent oleic acid, 53-75 per cent linolic acid, and 24-33 per cent iso- linolenic acid. It should, however, be pointed out that this composition cannot be reconciled with the iodine value. Physical and Chemical Characteristics of Arbutus Unedo Oil Specific Gravity. Solidify- ing Point. Saponifi- cation Value. Iodine Value. Reichert- WoUny Value. MaunienS Test. Butyro-refracto- meter. At°C. •c. Mgrms. KOH. Per cent. CO. KOH. °C. At°C. Degrees 15 0-9208 -27 208 147-8 0-86 103-5 (InTortelli's apparatus, olive oil being tlie diluent.) 25 71 LINARIA OIL ^ French—Huile de linaire, Huile de lin sauvage. German— Leinkrautdl. Italian—Olio di linaria. The seeds of Linaria reticulata (belonging to the Antirrhineo}) contain 37-5 per cent of linaria oil. Fohin states that the oil yields no linolic acid. Physical and Chemical Characteristics of Linaria Seed Oil Specific Gravity. Saponification Value. Iodine Value. At'C. Mgrms. KOH. Per cent.. 20 (water at 18'= 1) 0-9217 188-6 140-0 ' G. Hani, AUi R. Accad. dei Lincei,, Uonui, 1905, xiv. [2], 619-623; Chcm. OenlralbL, 1906, i. 373. Fokin, Chem. Revnc, 1906, 130.