|
|
dwaww(金币+1, 翻译EPI+1): 谢啦 可是只有一段呀 2011-03-20 19:44:38
Acetic acid was supplied by Sigma and ethanol and ethyl acetate were supplied by Merck. The components were degassed ultrasonically,dried over molecular sieves (type4A,Aldrich),and kept in an inert argon with a maximum water content of 2*10-6mass fraction. Their mass fraction purities were>99 mass% for acetic acid and>99.8 mass% for methanol,ethanol and ethyl acetate. The water was bidistillated and deionized.
醋酸由Sigma公司提供，乙醇和乙酸乙酯为Merck公司产品。这些原料经超声脱除空气、分子筛（4A型，Aldrich公司产品）干燥，然后保存在内充氩气的干燥器中（里面水含量最大不超过2*10-6质量分数）。醋酸的质量分数纯度大于99%，而乙醇和乙酸乙酯的质量分数超过99.8%。水为二次蒸馏、去离子水。 |
|
回复此楼