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目的研究食品包装三聚氰胺成型品中甲醛迁移规律。方法采用盐酸苯肼分光光度法测定60、75和90℃三个模拟温度下甲醛从食品包装用三聚氰胺成型品中迁移至3%乙酸、15%乙醇两种模拟溶剂中的量。根据所得的实验数据,讨论了不同温度和不同食品模拟物的选择对甲醛迁移行为的影响,以及样本重复10次进行迁移实验时甲醛迁移量的变化规律。结果3%醋酸作为模拟溶剂的甲醛迁移量较15%乙醇作为模拟溶剂的高,且其迁移量随着模拟温度的升高而增多;3个温度下,2种模拟溶剂中单次迁移实验的甲醛迁移量均未超过我国国家标准的限量值和欧盟规定对其规定的特定迁移量(SML)2.5 mg.dm-2,而以3%醋酸作为模拟溶剂的甲醛的10次迁移实验的总量均超过欧盟对甲醛的特定迁移量。结论食品包装用三聚氰胺成型品不宜在酸性和高温条件下使用。
Objective To study the migration of formaldehyde in food packaging melamine products. Methods The amount of formaldehyde migrating from melamine in food packaging to 3% acetic acid and 15% ethanol at 60, 75 and 90 ℃ simulated temperature was determined by phenylhydrazine hydrochloride spectrophotometry. Based on the experimental data obtained, the effects of different temperatures and different food simulants on the migration of formaldehyde were discussed. The changes of formaldehyde migration when the samples were repeated 10 times were discussed. Results The migration of formaldehyde with 3% acetic acid as the simulated solvent was higher than that with 15% ethanol as the simulated solvent, and its migration increased with the increase of the simulated temperature. In the three temperatures, the migration of formaldehyde in the two simulated solvents Formaldehyde migration did not exceed the limits of China’s national standards and the EU regulations for the specific migration (SML) of 2.5 mg.dm-2, and 3% acetic acid as a simulated solvent, formaldehyde 10 times the total amount of migration experiments All surpass the EU’s specific migration of formaldehyde. Conclusions The melamine products for food packaging should not be used under acidic and high temperature conditions.