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Opiates Cutoff Calibrator (Morphine 300 ng/mL)The Opiate Drug of Abuse (DAU) Calibrators are for use as calibrators in the qualitative and semi-quantitative calibration of the LinZhi International, Inc. (LZI) Opiate Enzyme Immunoassay (REF# 0020b/0021b) on a number of automated clinical chemistry analyzers.