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Blood Reaction

The test for blood on the reagent strip is based on the peroxidase-like activity of hemoglobin, which catalyzes the reaction of cumene hydroperoxide and 3, 3', 5, 5' tetramethylbenzidine.
The test is sensitive to free hemoglobin, myoglobin, and a minimum of 5 intact RBCs per microliter of urine.