Raw materials
The used raw materials were three species of fishes. They include Indopacific
king mackerel (Scomberomorus guttatus), White fin wolf-herring
(Chirocentrus nudus) and Hilsa shad (Tnualosa ilisha).
Pre-treatment of raw material
In order to enhance a successful extraction of the oil, the fish underwent
some treatment prior to the extraction. These include refrigeration which the
fish was freezed in order to preserve it since the extraction did not commence
immediately. The fish was thoroughly washed in order to remove dirt that
might get stuck to the body after undergoing a de-freezing process.
The fishes were then cut into sizes in order to enhance a speedy oven
drying because of their size while removing the gills and intestine which were
unwanted.
The moisture content of the fishes was reduced by oven drying since
water is immiscible in oil. The samples were further reduced in size and later
blended into a finer form by pounding in a mortar after undergoing the moisture
content elimination in the oven.
The weight of the samples were taken accordingly noting the difference
in weight due to weight lost through evaporation.