3) FREE FATTY ACID (2%
Maximum):
Definition:
A chemical content in the seeds that affects
the value of the seeds and the oil extracted from them in a negative way.
Manual Assessment
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Importance
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a) Appearance
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Fungal
growth (green or any other foreign coloured substances)
on the seeds is an indication that they contain excessive fatty acid or going
bad. The enzymes that play a role in the process of producing fatty acid are
already present in these products naturally, but are produced in greater
quantities when infection by insects
and fungi and mechanical injury occurs. Fungal growth on oil-containing products
takes place at moisture content above 7 - 8%.
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b) Odour
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The seeds have an aroma/smell that
is typical and specific to it. The presence of any foreign odour is an
indication of high free fatty acid.
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