A method using gas chromatography-mass spectrometry(GC-MS)to detect two slipping agents, stearic amide and erucic amide, in polyactic acid (PLA) foaming containers, was established. Migrations of two slipping agents into three food simulants (isooctane, ethanol, and 95% ethanol) were investigated at 40 ℃ and 70 ℃. PLA foaming containers were double-sided contacted with food simulants. Besides, threshold of toxicological concern (TTC) was introduced to assess the safety of two slipping agents in foods. It was shown that the migration amounts of two slipping agents into ethanol and 95% ethanol were almost the same, which were both higher than migrating to isooctane. Compared with erucic amide, stearic mide migrated faster into food simulants and had higher migration rate. However, since the initial content of erucic amide in PLA foaming containers was much higher than that of stearic amide, the migration amount of erucic amide was higher. Estimated daily intakes (EDI) of migrated stearic amide and erucic amide in food simulants were 0.34 mg/person/day and 0.73 mg/person/day, respectively. Both were higher than the safety threshold 0.09 mg/person/day, which means the amount of slipping agent used in this PLA foaming containers should be strictly controlled to ensure food safety.
HE Jinfeng
,
LV Xinguang
,
LIN Qinbao
,
LI Zhong
,
XU Caiyun
,
XIE Deming
. Migration of two slipping agents from polylactic acid foaming containers to food simulants[J]. Food and Fermentation Industries, 2019
, 45(7)
: 123
-129
.
DOI: 10.13995/j.cnki.11-1802/ts.019242
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