"રૂમાનની જાંબલી" નું નિરીક્ષણ એ કોની હાજરી માટે પુષ્ટિ આપનારું પરીક્ષણ છે
JEE MAIN 2016, Medium
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c Ninhdrin is often used to detect $\alpha $ - amino acids and also free amino and carboxylic acid group on proteins and peptides. when about $0.5\,ml$ of a $0.1\%$ solution of ninhydin is boiled for one or two minutes with a few $\,ml$ of dilute amino acid or protein solution, a blue colors decelops, ninhydrin degrades amino acids into aldehydes, ammonia, and $CO_2$ through a series of reactions; the net result is ninhydrin in a partially reduced form hydrindantin;
Ninhydrin then condenses with ammonia and hydrin dantin to produce an intensely blue or puple pigment, sometimes called Ruhemann's purple:
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