One hour post-dose, urine samples assayed with the Syva RapidTest and Genix RapidTech were positive. Confirmatory GC–MS was negative for opiate use. Both of these immunoassays are one-step ...
Basic Science The esterase method of detecting leukocytes in a urine sample relies on the fact that esterases are released from lysed urine granulocytes (neutrophils). In the dipstick method ...