Modern Methods for Detection of Fentanyl and Its Analogues: A Comprehensive Review of Technologies and Applications. 

Modern Methods for Detection of Fentanyl and Its Analogues: A Comprehensive Review of Technologies and Applications. 

Bojarska E, Zajaczkowski W, Furtak E, Stela M, Gorniak L, Podogrocki M, Bijak M. 

Molecules. 2025 Aug 31;30(17):3577. doi: 10.3390/molecules30173577. PMID: 40942102; PMCID: PMC12430130.

https://pmc.ncbi.nlm.nih.gov/articles/PMC12430130/