| 单词 | millon's test |
| 释义 | Millon's TestMillon’s Testa color reaction test used to detect the presence of proteins; first observed by the French chemist A. E. Millon in 1849. A purplish-red deposit is precipitated upon heating a protein solution containing Millon’s reagent (a solution of mercuric nitrate in nitric acid, with an admixture of nitrous acid). The reaction is caused by the presence of phenol radicals in the amino acid tyrosine, which is a constituent of proteins. Millon's testMillon's testa test for the presence of protein in a mixture, involving the use of Millon's reagent which contains mercuric nitrate and nitrite. On heating a proteinaceous solution with a few drops of Millon's reagent (using a fume cupboard) a purplish precipitate is formed. The test is less commonly used today because of the danger associated with handling mercuric salts, the BIURET REACTION being employed instead. |
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