Is we have any raw sample extract that show positive confirmation in ninhydrin test?
Any amino acid gives reaction with ninhydrin; your skin gets a purple color in contact with ninhydrin; therefore any protein extract will react.
Please look at the following below links which may help you in your analysis:
https://pdfs.semanticscholar.org/19a0/885bc303e628bcd43d27ee03c9298cbe568a.pdf
https://eurekamag.com/pdf/004/004399510.pdf
http://www.chem.boun.edu.tr/wp-content/uploads/2014/04/Chem-415-Experiment-2.pdf
Thanks
Any trace of protein can give a positive ninhydrin test. Even fingerprints give a ninhydrin color (which is often used to find them).
L-LEUCINE,GLYCINE WILL ANSWER NINHYDRIN TEST,EVEN IMIDAZOLE
Ninhydrin test is characteristic test for proteins. Very small quantities of proteins or amino acids (building blocks of proteins) will give positive ninhydrin test.
If you want a comprehensive list, check this out: Article Applications of the Ninhydrin Reaction for Analysis of Amino...
Else, this might do: https://www.onlinebiologynotes.com/ninhydrin-test-principle-requirements-procedure-and-result/
Note: proline/hydroxyproline gives a yellow color while asparagine gives a brown color instead of the usual purple color of Ruhemann's complex.
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