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Found this place in my own personal quest for some. There might be better.
http://www.sciencecompany.com/sci-exper/food_chemistry.htm#Biuret%20Reagent
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∙ 15y ago
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What is the reagent used to test proteins?
Buiret Reagent
If biuret reagent turns purple what substance is present?
food that has protein like milk will cause the Biuret solution to turn purple.
What type of food will give a negative Iodine test and a positive Biuret Solution test?
An iodine test is used to test for the presence of starch (or polysaccharides, specifically amylose or amylopectin). A Biuret solution test is used as an indicator for peptide bonds within proteins. Therefore, if you get a negative iodine test and a positive Biuret test, you would probably be testing a animal food source (beef, chicken, pork). Overall, any food that doesn't have starch present within it would be appropriate to use. Hope this helps!
What is an indicator for Albumin?
Biuret
What might Biuret reagent test in a practical real life situation?
Biuret reagent test in a practical situation tests for lipids. Biuret is used in food agents for protein amino acid chains.
What is the color of biruet solution?
The biuret solution used in the biuret test for peptide bonds is blue in the absence of peptide bonds or biuret which also results in a positive result. A positive result for peptide bonds or biuret is apparent as the biuret solution turns purple/violet in color.
What is the reagent used to test proteins?
Buiret Reagent
What is used to test for presence of protein?
Biuret solution
Which type of food is biuret solution used to test for?
protein
If biuret reagent turns purple what substance is present?
food that has protein like milk will cause the Biuret solution to turn purple.
What reagent is used to detect protein in a solution?
biuret reagent
What is the chemical indicator used to test protein?
To test for protein. Biuret or solutions of sodium hydroxide and copper sulfate. Tested with a dropper a + result will be purple or something
What is the function of copper sulphate solution in biuret test?
It cuts/breaks the peptide bonds.
When biuret reagent is added to an unknown colorless solution the solution turns light purple. this indicates the presence of which molecules?
process that release energy by breaking down food molecules in the presence of oxygen
Why both cows milk and water-buffalos milk produce a violet colour when tested with biuret solution?
Both cows milk and water-buffalo's milk produce a violet colour when tested with biuret solution because they both contain protein.
What is the function of alkaline solution in Biuret's test?
Alkaline levels are essential for the solution to change colour. Without alkaline levels, the colour of the solution would not be detectable.
Why protein solution turns purple when copper sulfate solution is added?
Copper sulfate solution provides cupric ions that react with the peptide bonds present in the protein molecule. The test is called as biuret test, as it was originally given by biuret compound.( when urea is heated it forms biuret). The reaction is due to the formation of complex between the cupric ions and lone pair of electrons present on the Nitrogen and Oxygen atoms of peptide bond.
