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the color of the salt prevents the recognition of the color produced in the reaction. The presence of ammonium salts interferes with the test
hope usefull :D
source: Experimental Organic Chemistry - James F. Norris, Ph.D. in chapter 26
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How many of these chemical groupings must be present in a molecule to give a positive biuret test?
you should have at least 2 of these,to obtain a positive result in Biuret's test. because biuret test is a test used to detect if there is peptide linkages.
What substance is used as a control in a Biuret test?
Biuret reagent is made up of sodium hydroxide and copper sulphate.
What color will a peptide bond be after using the Biuret test?
in biuret test the presence of peptide bonds gives a violet color. but it should be noted that a minimum of two peptide bonds should be present in the protein to get a positive answer to this test.
Detect peptide bond?
by conducting the biuret test. the positive result of biuret test will give you the purple blue ring on top of the solution.(albumen/milk + cuso4 +NaOH)
Is biuret test suitable to test the presence of proteins in the urine?
Yes, the biuret test will indicate the presence of peptides. If it turns violet, it is a positive result.
Would albumin give a positive biuret test?
Hey. okay.. the biuret test is a test for peptide bonds. when CuSO4 is added to KOH, an alkaline solution, nitrogen atoms from the peptide bond forms a purple compound with the Cu2+ ions. hope this helps! read it in a text book.
How many of these chemical groupings must be present in a molecule to give a positive biuret test?
you should have at least 2 of these,to obtain a positive result in Biuret's test. because biuret test is a test used to detect if there is peptide linkages.
What substance is used as a control in a Biuret test?
Biuret reagent is made up of sodium hydroxide and copper sulphate.
What color will a peptide bond be after using the Biuret test?
in biuret test the presence of peptide bonds gives a violet color. but it should be noted that a minimum of two peptide bonds should be present in the protein to get a positive answer to this test.
Caseine in biuret test?
Casein form a purple compound in the biuret test.
Detect peptide bond?
by conducting the biuret test. the positive result of biuret test will give you the purple blue ring on top of the solution.(albumen/milk + cuso4 +NaOH)
Is biuret test suitable to test the presence of proteins in the urine?
Yes, the biuret test will indicate the presence of peptides. If it turns violet, it is a positive result.
Does pepsin test positive in biuret test?
No
What is the name of the test for proteins?
The biuret test
What test would you run to test for the presence of a polypeptide?
Biuret test
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.
How you test if foods have proteins?
The Biuret test allows one to test for proteins.
