...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Food Additives & Contaminants >European survey on post-consumer poly(ethylene terephthalate) (PET) materials to determine contamination levels and maximum consumer exposure from food packages made from recycled PET
【24h】

European survey on post-consumer poly(ethylene terephthalate) (PET) materials to determine contamination levels and maximum consumer exposure from food packages made from recycled PET

机译：欧洲对消费后聚对苯二甲酸乙二醇酯（PET）材料的调查，以确定由回收PET制成的食品包装中的污染水平和最大的消费者接触量

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Typical contamination and the frequency of misuse of poly(ethylene terephthalate) (PET) bottles are crucial parameters in the risk assessment of post-consumer recycled (PCR) PET intended for bottle-to-bottle recycling for direct food contact applications. Owing to the fact that misuse of PET bottles is a rare event, sustainable knowledge about the average concentration of hazardous compounds in PCR PET is accessible only by the screening of large numbers of samples. In order to establish average levels of contaminants in PET source materials for recycling, PET flakes from commercial washing plants (689 samples), reprocessed pellets (38) and super-clean pellets (217) were collected from 12 European countries between 1997 and 2001. Analysis of these materials by headspace gas chromatography revealed average and maximum levels in PCR PET of 18.6 and 86.0 mg kg(-1) for acetaldehyde and 2.9 and 20 mg kg(-1) for limonene, respectively. Acetaldehyde and limonene are typical compounds derived from PET itself and from prior PET bottle contents (flavouring components), respectively. Maximum levels in PCR PET of real contaminants such as misuse chemicals like solvents ranged from 1.4 to 2.7 mg kg(-1) , and statistically were shown to result from 0.03 to 0.04% of recollected PET bottles that had been misused. Based on a principal component analysis of the experimental data, the impact of the recollecting system and the European Union Member State where the post-consumer PET bottles had been collected on the nature and extent of adventitious contaminants was not significant. Under consideration of the cleaning efficiency of super-clean processes as well as migration from the bottle wall into food, it can be concluded that the consumer will be exposed at maximum to levels <50 ng total misuse chemicals day(-1) . Therefore, PCR PET materials and articles produced by modern super-clean technologies can be considered to be safe in direct food applications in the same way as virgin food-grade PET.
机译：聚对苯二甲酸乙二酯（PET）瓶的典型污染和误用频率是旨在直接接触食品的瓶对瓶回收的消费后回收（PCR）PET风险评估中的关键参数。由于滥用PET瓶的情况很少见，因此只有通过筛查大量样品才能获得有关PCR PET中有害化合物平均浓度的可持续知识。为了确定可回收的PET原料中污染物的平均水平，1997年至2001年之间，从12个欧洲国家收集了商业洗涤厂的PET薄片（689个样品），再处理的颗粒（38）和超净颗粒（217）。通过顶空气相色谱法对这些材料的分析表明，PCR PET中乙醛的平均含量和最大含量分别为18.6和86.0 mg kg（-1），柠檬烯为2.9和20 mg kg（-1）。乙醛和柠檬烯分别是衍生自PET本身和先前PET瓶内容物（调味成分）的典型化合物。在PCR PET中，诸如污染物之类的不当化学药品之类的实际污染物的最大含量范围为1.4到2.7 mg kg（-1），据统计，这是被滥用的回收PET瓶的0.03％到0.04％。根据实验数据的主成分分析，回收系统和收集消费后PET瓶的欧盟成员国对不定污染物的性质和程度的影响并不显着。考虑到超净过程的清洁效率以及从瓶壁到食品的迁移，可以得出结论，消费者在最大误用化学物质日（-1）的最大暴露水平为<50 ng。因此，与原始食品级PET一样，通过现代超净技术生产的PCR PET材料和物品在直接食品应用中可以被认为是安全的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号