Saturday, October 26, 2013

Experiment write up, including method and discussion on testing food substances for the presence of lipids (fats)

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. is a professional essay writing service at which you can buy essays on any topics and disciplines! All custom essays are written by professional writers!
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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