Enzymatic Digestion and Selective Quantification of Underivatised Delta-9-Tetrahydrocannabinol and Cocaine in Human Hair Using Gas Chromatography-Mass Spectrometry
Figure 3
Chromatogram obtained after spiking hair with 5 ng Δ9-THC and digesting it with (a) Proteinase K and (b) NaOH.
