4.2.5. Storage
Barrels used for the storage of alcoholic drinks like Whisky, Beer
etc. are traditionally and convectional charred (also known as raw
material toasting) for the aging process. In traditional method
direct contact with fire and wood occurs while in convection
method hot air is circulated in clean close environment. The toasting
pattern of storage barrel determines the PAHs levels and the
amount was higher in traditional charring, at inner side and across
width of the charred stave, from where they migrate into the
drinks. High molecular weight spirits exhibited higher PAHs
amounts depending on barrel charring method and frequency of
reusing those barrels (Falcón & Gándara, 2005).