ISO 663-2017 pdf free.Animal and vegetable fats andoils — Determination of insolubleimpurities content.
This document specifies a method for the determination of the insoluble impurities content of animaland vegetable fats and oils.
lf it is not desired to include soaps (particularly calcium soaps) or oxidized fatty acids in the insolubleimpurities content, it is necessary to use a different solvent and procedure. In this case, an agreement isto be reached between the parties concerned.
Milk and milk products (or fat coming from milk and milk products) are excluded from the scope of thisdocument.
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references,only the edition cited applies. Forundated references, the latest edition of the referenced document (including any amendments) applies.
quantity of dirt and other foreign matter insoluble in n-hexane or light petroleum under the conditionsspecified in this document
Note 1 to entry:The content is expressed as a percentage by mass.
Note 2 to entry:These impurities include mechanical impurities, mineral substances, carbohydrates,nitrogenoussubstances, various resins, calcium soaps, oxidized fatty acids, fatty acid lactones, and (in part) alkali soaps,hydroxy-fatty acids and their glycerides.
A test portion is treated with an excess of n-hexane or light petroleum, then the solution obtained isfiltered. The filter and residue are washed with the same solvent, then dried at 103 °C and weighed.Ashless filter paper(maximum ash content 0,01 %, by mass),retention value of98 %, by mass, forparticles of size greater than 2,5 um1), or an equivalent glass-fibre filter, of diameter 120 mm, togetherwith a metal (preferably aluminium) or glass vessel with a well-fitting lid.These are alternatives to the filter (6.6) for all products except acid oils.
Filter crucible,glass, of grade P16(pore size 10 um to 16 um), diameter 40 mm, of capacity 50 ml,together with a suction bottle.
This is an alternative to 6.5 for all products including acid oils.
A representative sample should have been sent to the laboratory. It should not have been damaged orchanged during transport or storage.
Sampling is not part of the method specified in this document. A recommended sampling method isgiven in Iso 5555.ISO 663 pdf download.