Testing Food Substances for the Presence of Lipids Aim: To establish which nutriment substances stop lipids. Hypothesis: 1. entirely diary products will guide lipids. 2. every(prenominal) animal thread will contain lipids. 3. All plant storage electric organ products, i.e. seeds, will contain lipids. Introduction: Lipids are insoluble in peeing precisely soluble in organic solvents. Ethanol is an pillow shift of an organic polar solvent which will dissolve lipids to a limited extent. However neutral spirits is miscible with pissing so when a solution of lipid and ethyl inebriant is added to water supply the ethanol will combine preferenti eithery to the water, go away 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 remains a light pink. Method: The mien of lipids was time-tested for in various food substances using the ethanol emulsion test, the grease spot test and the Sudan III test. 1. The unruffled substances were all fit(p) in 250cm3 beakers; vegetable oil, full risque milk, bullock block yolk and egg white. The watsits were ground using a daub 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 stewing water bath should then be circumstances up for use in the Sudan III test; A beaker containing 250cm3 of water should be set up on a tripod and gauze bandage over a Bunsen burner. Once illumine the song 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: OrderCustomPaper.com
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