An analytical method for the determination of allicin (diallyl thiosulfinate) in garlic (Allium sativum L.) samples using
reversed-phase HPLC with both UV and electrochemical detection (ED) and on-line post-column photochemical reaction is
reported. Standard allicin was synthesised and its behaviour at the chosen analytical conditions was tested. The post-column
irradiation at 254 nm on the one hand decreased the response of allicin to UV detector, and on the other hand, allowed the
determination of this compound, which is otherwise electrochemically inactive, using the electrochemical detector. Detection
limits of 0.1 and of 0.01 mg/l using UV and ED detectors, respectively, and linearity of response in the range 1–8 mg/l were
obtained. Samples of garlic extracts, obtained following two different extraction procedures, were analysed and the results
obtained using both UV and electrochemical detectors were compared. © 2001 Elsevier Science B.V. All rights reserved.