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Methods to determine the quality of acid oils and fatty acid distillates used in animal feeding
Varona, Elisa (Universitat de Barcelona. Institut de Recerca en Nutrició i Seguretat Alimentària)
Tres, Alba (Universitat de Barcelona. Institut de Recerca en Nutrició i Seguretat Alimentària)
Rafecas, Magdalena (Universitat de Barcelona. Facultat de Farmàcia)
Vichi, Stefania (Universitat de Barcelona. Institut de Recerca en Nutrició i Seguretat Alimentària)
Barroeta, Ana Cristina (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)
Guardiola Ibarz, Francesc (Universitat de Barcelona. Institut de Recerca en Nutrició i Seguretat Alimentària)

Date: 2021
Abstract: Acid oils and fatty acid distillates are by-products from the refining of edible oils and fats. They are used as feed ingredients, but their highly variable composition sometimes affects the productive parameters of the animals. Thus, their quality control and standardization are necessary. The official methods recommended for crude and refined fats and oils must be modified to give reliable results when applied to acid oils and fatty acid distillates. This article summarizes the drawbacks that were encountered during the setup of the analytical methods and how were they overcome by adapting the methods to these type of fat samples. Some methods such as the determinations of fatty acid composition, tocopherol and tocotrienol content, unsaponifiable matter, acidity and peroxide value had to be minimally adapted. However, others such as the determinations of moisture and volatile matter, insoluble impurities, lipid classes and p -anisidine value showed important drawbacks that required a more significant adaptation.
Grants: Ministerio de Economía y Competitividad AGL2015-64431-C2-2-R
Ministerio de Economía y Competitividad BES-2016-077486
Ministerio de Economía y Competitividad RYC-2017-23601
Rights: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. Creative Commons
Language: Anglès
Document: Article ; recerca ; Versió publicada
Subject: Analytical methods ; Quality control ; Fat by-products ; Feed ingredients ; AO, acids oils ; P -AnV, p -anisidine value ; FA, fatty acids ; FAD, fatty acid distillates ; FAME, fatty acid methyl esters ; FFA, free fatty acids ; HPLC, high performance liquid chromatograph ; I, insoluble impurities ; M, moisture ; MIU, sum of moisture, insoluble impurities and unsaponifiable matter ; RSD, relative standard deviation ; T, tocopherols ; T3, tocotrienols ; U, unsaponifiable matter ; U/S ratio, unsaturated/saturated fatty acid ratio
Published in: MethodsX, Vol. 8 (april 2021) , ISSN 2215-0161

DOI: 10.1016/j.mex.2021.101334
PMID: 34430240


10 p, 515.6 KB

The record appears in these collections:
Articles > Research articles
Articles > Published articles

 Record created 2021-08-30, last modified 2023-03-15



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