The polyester film laminated steel surface may produce a variety of oligomers during the polymerization process and some oligomers may migrate to the food during contact with food, causing potential safety hazards. In this study, a method was established for the simultaneous determination of the content of six PET (polyethylene terephthalate) and PBT (polybutylene terephthalate) cyclic oligomers in laminated steel canned food, and the results showed that the method had a good linear relationship, the correlation coefficient was greater than 0.99, the detection limit was 0.11-44.12 μg/L, the quantification limit was 0.36-147.06 μg/L, the recovery rate was 80.80%-102.71%, and the relative standard deviation was 0.37%-9.26%. The established method was used to determine the PET and PBT cyclic oligomers in the laminated steel canned food, and the results showed that among the four types of laminated steel canned food in meat, beverage, fruit, and beer, the content of PET cyclic trimer was the largest, and the content of six PET and PBT cyclic oligomers was meat> beverage> fruit > beer. This study aims to provide a method and safety basis for the application of laminated steel materials in canned food.
WU Gang
,
PAN Jiajie
,
XU Tongtong
,
LU Qiumian
,
FENG Jianing
,
MENG Zhen
,
QIU Kai
,
GUO Xinguang
. Determination of polyethylene terephthalate and polybutylene terephthalate cyclic oligomers in laminated steel canned food[J]. Food and Fermentation Industries, 2023
, 49(19)
: 312
-318
.
DOI: 10.13995/j.cnki.11-1802/ts.034553
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