Test for Starch, Proteins and Fats | Study Guide - Edubirdie

University:
Eastern Kentucky University
Course:
HEA 216 | Introduction to Public Health
Academic year:

2021
Views:

217

Pages:

1
Author:

Brent Cantu

Test for Starch, Proteins and Fats Test for Starch Procedure: Cut a piece of potato and add few drops of iodine to it. Observation: Observe the colour change in the potato. The colour of iodine changes to blue-black colour. Conclusion; This confirms the presence of starch in food item Test for Protein Procedure • Take some gram and grind it and add this to a test tube containing some amount of water. Shake well. • Now add two drops of copper sulphate to it and then ten drops of caustic soda to it. • After shaking it properly let it stand for a while. Observation Observe the colour change in the test tube. Conclusion The colour changes to violet confirming the presence of protein in gram. Test for Fats Procedure • Take some butter and wrap it with a paper and crush it. • Now hold the paper against the light source and see. Observation You will see some oily spot or patch on the paper causing a translucent appearance of the paper. Conclusion The appearance of these spots confirms presence of fats.

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