The invention discloses a method for detecting
propyl gallate and
formaldehyde, which is characterized in that a
zinc-based monatomic nano-
enzyme is synthesized by a salt template method, based on the characteristic that Zn-N-C
zinc has
electron and geometric structures similar to those of the
active center of natural metalloenzyme, and the strong simulated
peroxidase activity is shown. The substrate
propyl gallate can be rapidly oxidized into a yellow oxidized quinones substance, and
formaldehyde can inhibit the oxidation reaction, so that the
rapid detection method of PG and
formaldehyde is established, and the method is applied to detection and analysis of PG and formaldehyde in food. The result of the method is consistent with a method for determining nine antioxidants in food in GB5009.32-2016
food safety national standard and a method for determining formaldehyde in food in GB / T5009.49; the method can only selectively and rapidly oxidize PG, the
reaction speed of other antioxidants is low, and the method has the advantages of being high in sensitivity, high in specificity, easy to operate, rapid and the like.