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假的.
Health Stream Article - Issue 32 December 2003
PET Urban Myth Hits Australia
Australian consumers were recently alarmed by a widely circulated
email claiming that reuse of PET (polyethylene terephthalate)
bottles for storing water and other beverages constituted a cancer
risk. The email was a revival of a scare that hit the US about two
years ago, which alleged that a potentially carcinogenic plasticiser
used in the manufacture of PET could leach from the plastic at
dangerous levels if the bottles were reused for a prolonged period.
The email urged users to discard PET bottles after no more than one
week of use.
The email caused alarm among members of the public, with several
hundred people contacting state and federal health departments and
other regulatory authorities. The topic was raised on talkback radio
shows, and the CRC also received a number of enquiries on the issue.
According to media reports, military authorities in one state were
on the verge of removing all PET bottled beverages from their
facilities, similar action was being taken by many school tuck
shops, and warnings were being included in school newsletters. The
level of public concern prompted Food Standards Australia New
Zealand (FSANZ) to issue a Fact Sheet refuting the claims made in
the email (1). This was further supported by statements from the
Plastics and Chemicals Industries Association and the Soft Drink
Association.
The errors and inaccuracies in the email and the background and
apparent origins of this particular urban myth are outlined below:
the email stated that the plasticiser, abbreviated as DEHA, was
diethylhydroxylamine.
This compound is not a plasticiser and has a strong fishy smell
which would make it very apparent in water. The plasticiser
abbreviated as DEHA is in fact diethylhexyl adipate.
the email stated that DEHA is used in making PET bottles.
This compound is not used in the manufacture of PET, and is not
present either as a raw material, byproduct or breakdown product of
PET.
the email contained an abstract of a paper from the 2001 Annual
meeting of the Society for Risk Analysis, reporting the migration of
four compounds including DEHA from PET bottles into stored water.
This report by a Masters student was not subject to peer review or
verification prior to publication on the internet. Subsequent
investigation indicated the reported "detection" of chemicals was in
fact due to background contamination from laboratory plasticware,
not leaching of compounds from the PET bottles under test.
Paradoxically, the email also contained a summary from a report by
the Swiss Federal Laboratories for Materials Testing and Research on
migration of organic compounds from PET bottles (2). This was
presumably included as supporting evidence for the initial abstract
but actually contained several findings which refuted the alleged
risk: |
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非常好的忠告  |
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貴有貴玩，平有平玩，自己郁手仲更好玩
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切勿再翻用礦泉水膠樽！
很多人會不知道再用的膠樽所產生的毒素，有人可能已經習慣使用或再用你的礦泉水樽，將它們放在車上或上班時用，實在不是一個好主意。這件事發生在杜拜，一個十二歲的女童，因為連續十六個月習慣使用一個SAFA牌礦泉水樽，她得了癌病。她習慣了帶著這個水樽上學，她還在水樽表面繪畫了圖案。在這個樽殼裏面，一種叫做polyethylene terephthalate 或簡稱 PET的塑膠，裏面含有一些叫做diethylhydroxylamine 或簡稱 DEHA的潛在致癌物質，一次過用是安全的，如果你真的要再用，用多幾日也無妨，最多一個星期吧！要將它們遠離熱力，重覆地去清洗或過水會分解那些致癌物溶在你所盛載的水中，如真的想重覆用一個樽，倒不如花一點錢去買一個較昂的專用水樽。這些錢，你真的不應去吝嗇，你的家人，最好建議他們，特別是小童。請傳開這個訊息。 
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不論是投影雞(Projector)定還是蛋雞(CRT),播得出靚畫
面就是好雞....!!!
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