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  3. Stories about the dangers of chemicals leaching from plastic into microwaved food have circulated on the Internet for years. As

Stories about the dangers of chemicals leaching from plastic into microwaved food have circulated on the Internet for years. As

admin2019-03-20  102
问题 Stories about the dangers of chemicals leaching from plastic into microwaved food have circulated on the Internet for years. As a result, the Food and Drug Administration continues to receive inquires from concerned consumers.
Consumers can be confident as they heat holiday meals or leftovers in the microwave because the FDA carefully reviews the substances used to make plastics designed for food use.
"It’s true that substances used to make plastics can leach into food, " says Edward Machuga, Ph. D. , a consumer safety officer in the FDA’s Center for Food Safety and Applied Nutrition. "But as part of the approval process, the FDA considers the amount of a substance expected to migrate into food and the toxicological concerns about the particular chemical." The agency has assessed migration levels of substances added to regulated plastics and has found the levels to be well within the margin of safety based on information available to the agency. The FDA will revisit its safety evaluation if new scientific information raises concerns.
One chemical called diethylhexyl adipate(DEHA)has received a lot of media attention. DEHA is a plasticizer, a substance added to some plastics to make them flexible. DEHA exposure may occur when eating certain foods wrapped in plastics, especially fatty foods such as meat and cheese. But the levels are very low. The levels of the plasticizer that might be consumed as a result of plastic film use are well below the levels showing no toxic effect in animal studies.
[Keywords]
Center for Food Safety and Applied Nutrition 食品安全和应用营养中心
toxicological adj. 毒物学的 plasticizer n. 增塑剂
选项
答案 危险的化学物质从塑料渗入微波食物的说法已经在网络上流传了多年。结果，食品和药物管理局连续收到一些表示担心的消费者的询问。 消费者可以大胆地用微波炉去加热节庆食品以及剩饭，因为食药局认真检查了用于制造食物所用的塑料的化学物质。 “用于制造塑料的化学物质确实会渗进食物”，爱德华?马楚葛博士说，他是食药局食品安全和应用营养中心负责消费者安全的官员。“但作为审批流程的一部分，食药局会仔细考虑渗入食物的化学物质的分量以及与特定化学材料相关的毒物化学的物质。”食药局已经对添加到规定塑料中的物质的渗入水平作了评估，以分析出的信息在看，渗入的水平正好在安全系数之内。若再出现新的科研信息，食药局会对安全监测结果重新评估。 有一种叫作己二酸二辛已酯的化学物质已经引起了媒体的关注。己二酸二辛酯是一种增塑剂，添加到塑料里使之更加具有弹性。吃某些塑料包装的食品时己二酸二辛酯可能会渗出，特别是用袋子里装油腻的食物，如肉和奶酪。但渗入的水平会很低。使用塑料薄膜渗出塑化剂的水平低于用动物做实验的渗出水平，而后者显示是没有毒性反应的。
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