ISO 5518:2007
Fruits, vegetables and derived products -- Determination of benzoic acid content -- Spectrophotometric method
détails du produit
As chlorobenzoic acids are resistant to oxidation, the method cannot be applied in the presence of p-chlorobenzoic acid, as the absorption spectrum of this acid is close to that of benzoic acid. Neither can it be used in the presence of cinnamic acid, which is transformed into benzoic acid by chromic acid oxidation.