Combined liquid chromatography–coulometric detection and microextraction by packed sorbent for the plasma analysis of long acting opioids in heroin addicted patients
Keywords: متادون; NLX, naloxone; BPN, buprenorphine; N-BPN, norbuprenorphine; MTD, methadone; ORT, opioid replacement therapy; MMT, Methadone Maintenance Therapy; IS, internal standard; MEPS, microextraction by packed sorbentBuprenorphine; Norbuprenorphine; Methadone; Nalo