https://www.ojp.gov/library/publications/ultraviolet-resonance-raman-spectroscopy-detection-cocaine-oral-fluid
Ultraviolet Resonance Raman Spectroscopy for the Detection of Cocaine in Oral Fluid | Office of...
This study tested the possibility of using resonance Raman spectroscopy to detect cocaine in oral fluid without pretreating samples.
resonance raman spectroscopy