Pooled Normal Human Urine from Innovative Research was recently used in the following study:
Talanta, June 2018
Analysis of Isomeric Opioids in Urine using LC-TIMS-TOF MS
Kendra J. Adams, Cesar E. Ramirez, Natalie F. Smith, Ana Celia Muoz-Muoz, Lawrence Andrade, Francisco Fernandez-LimaTalanta, June 2018
... norcodeine (N-005), norcodeine-D3 (N-082), norhydrocodone (N-053) and norhydrocodone-D3 (N-054). Human urine was purchased from Innovative Research (Novi, MI, USA) and supplied by opioid-free volunteers ...