评估和建模烯从聚烯的烯迁移,用于食品包装
Adriana C Forero1, Johanna Garavito1, Diego A Castellanos1
1Food Packaging and Shelf Life Laboratory, Instituto de Ciencia y Tecnología de Alimentos, Universidad Nacional de Colombia, Bogotá, Colombia.
Journal of food science
|October 31, 2023
概括
这项研究验证了一种方法来测量聚烯食品包装中的烯酸迁移. 结果显示,移民水平仍低于监管限制,确保食品安全.
科学领域:
- 食品科学与技术 食品科学与技术
- 聚合物科学 聚合物科学
- 分析化学 分析化学
背景情况:
- 聚烯包装中的烯酸迁移可能会影响食品的保质期.
- 对于食品包装中的烯酸度存在监管限制.
研究的目的:
- 为了验证一种分析技术来定量烯酸单体.
- 为了评估从聚烯到食品仿真剂中的烯酸的迁移.
- 评估迁移水平是否超过了可容忍的限制.
主要方法:
- 使用头空间气体色谱与火焰电离检测 (HS-GC-FID).
- 在20°C和44°C的水和50%的乙醇中进行了6周的迁移研究.
- 伪二阶动力学被应用于模型迁移.
主要成果:
- 分析方法实现了0.10 ± 0.04μg kg-1.1的量化极限.
- 乙烯的平衡度在13.58至16.58μg kg-1之间,取决于模拟剂和温度.
- 预测的迁移水平低于确定的可容忍的特定迁移限制.
结论:
- 经过验证的分析方法准确量化了烯酸迁移.
- 聚烯包装显示了与食品接触的安全烯酸迁移水平.
- 这项研究提供了一个工具,可以根据迁移动力学预测食品包装的保质期.
相关概念视频
01:20Anionic Chain-Growth Polymerization: Overview
2.1K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
2.1K
01:31Plasticizers
77
Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
77
00:53Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)
1.9K
Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
1.9K