Abstract

THE DEMONSTRATION of leukocyte peroxidase activity has been of practical value to the hematologist since the beginning of the present century. Many technics have been described based on the use of benzidine base as an indicator. 1. , 2. , 3. , 4. , 5. , 6. , 7. This compound when oxidized precipitates as brown or blue insoluble crystals or granules.