glacial acetic acid, gum guaiac solution, and hydrogen peroxide are added to an aqueous suspension of the suspected stain; if occult blood or blood pigment is present, a blue color develops. Syn: guaiac test, Schönbein’s test, van Deen’s test.
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glacial acetic acid, gum guaiac solution, and hydrogen peroxide are added to an aqueous suspension of the suspected stain; if occult blood or blood pigment is present, a blue color develops. Syn: guaiac test, Schönbein’s test, van Deen’s test.