推 hugogo:專業 推 12/06 06:55
※ 引述《Huangs (狐狸吃小鳥)》之銘言：
: 這裡可以參考一下：
: http://en.wikipedia.org/wiki/Lead_crystal
: Lead crystal and food safety
: Significant amounts of lead can migrate from lead crystal containers into
: beverages stored in them.[1] Lead crystal typically contains 24–35 percent
: lead oxide. In a study performed at North Carolina State University, the
: amount of lead migration was measured for port wine stored in lead crystal
: decanters. After two days, lead levels were 89 μg/L (micrograms per liter).
: After four months, lead levels were between 2,000 and 5,000 μg/L. White wine
: doubled its lead content within an hour of storage and tripled it within four
: hours. Some brandy stored in lead crystal for over five years had lead levels
: around 20,000 μg/L.[citation needed] To put this into perspective, EPA's
: lead standard for drinking water is 15 μg/L = 15ppb.[2] Citrus juices and
: infant formula leach lead from crystal just as effectively as alcoholic
: beverages. Several companies do make lead crystal baby bottles and it is
: suspected they may present a health danger to infants.[citation needed]
鉛 - 吸入食入可造成腦部受損、昏脹、食慾不振、噁心、想吐、嚴重可引死亡，
在人體內會造成累積，便秘、焦慮、關節痛、腹痛都有可能，
牙齒會在牙齦處形成鉛線累積沉殿。
也會使胎兒神經系統受損，造成兩性生殖系統損害，
男性陽萎、無性慾、無生育力；女性早產、流產、經期不正常。
晶體不溶於水，氧氣存在下水和弱有機酸會侵蝕鉛，照上述原文
水晶玻璃杯為含鉛量24-35%的玻璃製成，而上述實驗酒儲於水晶玻璃器皿內
兩天後鉛含量為89 ppb. (parts per billion)
四個月鉛含量為2000-5000 ppb. 每10^9克中的含量
五年後鉛含量為20000 ppb. 例 <== 每1000000000克酒含20000克鉛
也等於每升含20000μg鉛
人體8小時平均暴露容許量 0.1mg/m^3 (空氣含量)
短時間暴露容許量 0.3mg/m^3
生物指標 30μg/100ml = 300 ppb. (血液中含鉛容許量)
假設你喝的酒含鉛量全部吸收，以正常男性體重70為假設，大約有1/13體重為血，
所以你有五公斤多的血量，約為5L，300μg * 5 = 1500μg
這個意思說放在水晶玻璃杯兩天的你可以喝16升還沒達上限，
故酒杯買水晶玻璃的倒酒來喝是極安全的，但儲酒瓶就不要，
四個月的溶出量光一升沒喝完已經爆上限了!
參考資料 物質安全資料表
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