Testing Food Substances for the Presence of Lipids Aim: To establish which nourishment substances catch lipids. Hypothesis: 1. entirely diary products will insure lipids. 2. tot completelyy animal thread will contain lipids. 3. All plant storage electric organ products, i.e. seeds, will contain lipids. Introduction: Lipids are insoluble in peeing nevertheless soluble in organic solvents. Ethanol is an pillow sack of an organic polar solvent which will dissolve lipids to a limited extent. However neutral spirits is miscible with body of wet so when a solution of lipid and ethyl inebriant is added to water supply the ethanol will combine preferentially to the water, passing the ethanol to take a shit tiny globules in the water. These globules then form a uninfected photographic emulsion. Sudan III is a dye which binds preferentially to lipids and will sucker them red. When lipids are in an aqueous suspension, the dye will vividness them red whilst the water rem ains a light pink. Method: The mien of lipids was well-tried for in various food substances employ the ethanol emulsion test, the grease spot test and the Sudan III test. 1. The unruffled substances were all dictated in 250cm3 beakers; vegetable oil, full risque milk, pelt yolk and egg white. The watsits were ground using a howitzer and pestle.
All of the other substances were placed into petri dishes; the butter, margarine and pad were placed in directly; the bacon and cheese were thinly slice using a scalpel and white tile and the chocolate was grated. 2. A boiling water bath should then be circumsta nces up for use in the Sudan III test; A bea! ker containing 250cm3 of water should be set up on a tripod and netting over a Bunsen burner. Once illumine the oxygenize hole on the Bunsen burner should be overt so that it burns with a blue flame. The Grease temporary collection Test... If you want to get a full essay, order it on our website:
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