Fig. 3From: Rapid and simple LC–MS/MS determination of urinary ethyl glucuronide, naltrexone, 6β-naltrexol, chlordiazepoxide, and norchlordiazepoxide for monitoring alcohol abuseRepresentative LC–MS/MS MRM chromatograms obtained from a blank urine, b spiked urine containing 50 ng/mL of EtG, 6βNTX, CDP, and norCDP, and 10 ng/mL of NTX, and c NTX-positive urine sampleBack to article page