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Pronunciation: shā′fĕr
Definition: a test for nitrites in the urine; urine is decolorized with animal charcoal and then 4 ml of a 10% solution of acetic acid and 3 drops of a 5% solution of potassium ferrocyanide are added; if nitrites are present, an intense yellow color will be produced.
Examples: glitazone, GI cocktail, etc.
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