June 27, 2024

PURPOSE: Samples seized from the Southwest border ports of entry by Customs and Border Protection (CBP) are submitted to the Center for Forensic Science Research and Education (CFSRE) for the purposes of qualitative and quantitative testing. The purpose of this report is to provide information on the quantitative results for tablets seized in 2020—2023.

BACKGROUND: 30—50 tablets from seizures suspected to contain fentanyl were submitted. The tablets were separated into populations by appearance. 15 or 30 tablets from each population (if available) were tested. Tablets were analyzed by liquid chromatography tandem mass spectrometry (LC/MS/MS). Select  drugs and adulterants identified in the samples were quantitated to determine their purity. The samples in this report originated from three ports of entry - AZ-POE 1 and CA-POE 2 & 3.