
Liquid chromatography-tandem mass spectrometry (LC-MS/MS) finds high fentanyl levels do not predict toxicity in tolerant users.
Paper spray-mass spectrometry vs. liquid chromtography-tandem mass spectrometry (LC-MS/MS): Can rapid screening rival the gold standard in ER drug testing?
For forensic and clinical toxicologists, the gold-standard analytical technique is not always the one you can use when it matters most.






