Wurster test
Wur·ster test
(vūr'ster),an obsolete test for tyrosine in which a substance is dissolved in boiling water and quinone is added. If tyrosine is present, a ruby-colored reaction takes place, and the solution turns brown after a few hours.
Wurster,
Casimir, German chemist, 1856-1913.Wurster reagent - filter paper impregnated with tetramethyl-p-phenylenediamine, which turns blue in the presence of ozone or hydrogen peroxide.
Wurster test - for tyrosine.