PCP, see Phencyclidine Peroxidase, adulteration of urine specimens, 224 detection in specimens, 227, 228 Phencyclidine (PCP), history of use, 218 window of detection, 219

POCT, see Point-of-collection testing Point-of-collection testing (POCT), see also specific devices, bar code perspective of test lines, 206, 207

barriers to manual testing, 208, 209 benefits, 202

competitive immunoassays, 41, 42 complications, accuracy concerns, 203, 204 aliquoting of specimens, 203 donor anonymity, 204 transcription errors, 204, 205 implementation, 40, 41 laboratory service decentralization to point of collection, 205, 206

oral fluid testing challenges, 146 Pyridinium chlorochromate, adulteration of urine specimens, 223 detection in specimens, 226

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