Seeing the smell of garlic: Detection of gas phase volatiles from crushed garlic (Allium sativum), onion (Allium cepa), ramsons (Allium ursinum) and human garlic breath using SESI-Orbitrap MS

•Secondary electrospray ionisation (SESI) implemented for volatile sulfur compounds.•Intact allicin measured in vapour from a solution of synthetic allicin and fresh garlic.•Distinct smell of onion and garlic: different amounts of C3H6OS and C6H10OS2 products.•Kinetics of allicin and allicin metabolites measured in human breath after eating raw garlic.