Abstract
The migration rules of two triazine type of UV absorbents (UV-1577 and UV-1579) from polypropylene (PP) food contact materials to food simulant were investigated. A rapid detection method of UV-1577 and UV-1579 in PP food contact materials was established by ultra-performance convergence chromatography (UPC2). The optimal extraction method of the initial solution was determined, and the pretreatment methods of two UV absorbents in the liquid simulants were optimized. Experiment results showed that the interaction effects between the two UV absorbers and the liquid simulants were weak, and the migration behavior was the most obvious in the fatty simulant of isooctane. At the same temperature, the migration amount of both UV-1577 and UV-1579 increased with the extension of time, and UV-1577 was more prone to migration than UV-1579. Within a certain range, the migration amount of the two UV absorbents increased significantly with the increase of the migration temperature. The higher the temperature was, the shorter the time required to reach the equilibrium.
Highlights
Polypropylene (PP) food grade plastic is widely used in the production of a variety of food packaging containers due to the good characteristics concluding light weight, impact resistance and high temperature resistance
The mixed standard solutions with different concentrations were added in the blank food simulants without UV absorbents
UPC2 was used to establish a method for the detection of UV-1577 and UV-1579 in polypropylene (PP) food contact materials
Summary
Polypropylene (PP) food grade plastic is widely used in the production of a variety of food packaging containers due to the good characteristics concluding light weight, impact resistance and high temperature resistance. PP food contact materials are easy to oxidize and yellowing under prolonged light conditions. UV absorbents are often added in the production process to reduce UV radiation damage and degradation of PP materials[1,2,3]. As a common food packaging additive, UV absorbents are mainly divided into salicylate, benzotriazole and triazine. Triazine UV-absorbent is a new kind of UV-absorbent with light color, high UV absorbance and less dosage. UV absorbents may pose a threat to human health by migrating from food contact materials to food[4,5,6,7]
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