Trace metal contents, chemical properties and oxidative stability of capelin and herring oils produced in norwegian plants

Autor:	M. H. Chahine, O. Notevarp
Rok vydání:	1972
Předmět:	General Chemical Engineering Organic Chemistry Inorganic chemistry chemistry.chemical_element Copper Peroxide law.invention chemistry.chemical_compound Nickel chemistry law Trace metal Tocopherol Peroxide value Food science Atomic absorption spectroscopy Refining (metallurgy)
Zdroj:	Journal of the American Oil Chemists' Society. 49:274-277
ISSN:	0003-021X
DOI:	10.1007/bf02582592
Popis:	The iron and copper contents of 14 crude capelin oils, two herring oils and one blend produced in oil meal plants in northern Norway were determined by atomic absorption spectroscopy (AAS). Their oxidative stability, peroxide (PV), benzidine (BV) and iodine values (IV), free fatty acids (FFA) and tocopherol contents were also evaluated. The oxidative stability was found to be more dependent on the tocopherol content and BV of the crude oils than on their content of trace metals. Changes in iron, copper and nickel contents were determined by AAS after refining and hydrogenation of marine oils in two Norwegian hydrogenation plants. The content of trace metals in the oils and hydrogenated products decreased as a result of alkali refining and bleaching to the lower limits of detectability by the method used, and amounted to 0.01 (oils), 0.02 and
Databáze:	OpenAIRE
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