Cocaine Metabolite 150 Level 2 Control (BE 187.5 ng/mL)

The LZI Cocaine Metabolite Controls are human urine-based liquids, and ready to use. The constituent is a processed drug-free human urine matrix containing buffers, stabilizers, and less than 0.1 % of sodium azide. The controls are prepared by spiking known concentrations of benzoylecgonine into the drug-free matrix. Controls are made from NIST traceable standards.