Geffert et al., Validation of a New LC-MS/MS Assay for the Analysis of Drugs in Urine and Comparison with Established Analytical Methods (GC-MS and LC-MS/MS): Advantages for daily Laboratory Routine. GTFCh Symposium 2019.
 Wang P et al., Incomplete Recovery of Prescription Opioids in Urine using Enzymatic Hydrolysis of Glucuronide Metabolites. J. Analytical Toxicology, (2019), 571-575.
 Hackett LP et al., Optimizing the hydrolysis of codeine and morphine glucuronides in urine. Ther Drug Monit., (2002), 652-657.
 Opiate & Benzodiazepine Confirmations: To Hydrolyze or Not to Hydrolyze is the Question. J. of Appl. Lab Med., (2018), 1-9.
Article originally published in:
Clinical Laboratory International, September 2019, p. 24-25