Purity Liquid Nitrogen and Liquid Oxygen in Laboratory
zhang Kaida; Qian Yinghu
The method,in which to use liquid air as cold resources,by the way of repetitive distillation and condensation to get more pure liquid ni-trogen and liquid oxygen has been described.The difference between liquid oxygen and liquid nitrogen’s nornlal boilingpoint A To。n=12.75K. The de- viation from the standard numerical value0.1K.
【CateGory Index】： TQ116.14