The lack of accurate fit-for-purpose methods to determine
formaldehyde in food and the pervasiveness of formaldehyde in
nature make the detection of illegally added formalin challenging.
Moreover, formaldehyde content in fresh food products varies with
development stages and environmental factors. Formaldehyde
occurs naturally in free and bound forms. Formaldehyde can bind
reversible arginine, tyrosine and lysine protein residues yielding
methylol groups, Schiff bases, methylene bridges and imidazolidinone
adducts. Primarily, free formaldehyde is of toxicological
interest and it is the compound measured as a potential adulterant
(Metz et al., 2006; Rehbein, 1987).
The lack of accurate fit-for-purpose methods to determineformaldehyde in food and the pervasiveness of formaldehyde innature make the detection of illegally added formalin challenging.Moreover, formaldehyde content in fresh food products varies withdevelopment stages and environmental factors. Formaldehydeoccurs naturally in free and bound forms. Formaldehyde can bindreversible arginine, tyrosine and lysine protein residues yieldingmethylol groups, Schiff bases, methylene bridges and imidazolidinoneadducts. Primarily, free formaldehyde is of toxicologicalinterest and it is the compound measured as a potential adulterant(Metz et al., 2006; Rehbein, 1987).
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