| Wurster's reagent | Filter paper impregnated with tetramethyl-p-phenylenediamine, which turns blue in the presence of ozone or hydrogen peroxide. (05 Mar 2000) |
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| Wurster's test | A test for tyrosine; the substance is dissolved in boiling water and quinone is added; if tyrosine is present a ruby-coloured reaction takes place, the solution changing to brown after a few hours. (05 Mar 2000) |
| Wurster, Casimir | <person> German chemist, 1856-1913. See: Wurster's reagent, Wurster's test. (05 Mar 2000) |