Core^TM  Ket diagnostic test, One step, urine based drug of abuse screening tests are a rapid, visual, sensitive immunoassay test. They are the most widely accepted methods for screening urine for drug of abuse. One-Step Ketamine Test is based on the principle of the high affinity and specific antibody and antigen reaction. It can be performed without the use of an instrument. The test utilizes a monoclonal antibody to selectively detect elevated levels of Ketamine in urine. The test will show a positive result when the Ketamine in urine reaches 1000ng/ml.