制备2%红汞液时,由于红汞的引湿性,加入水中后常易结成块而粘底,致不能很快溶解。我们采用下法制备较为快便:置红汞于干燥容器中,加入少量乙醇,搅拌使红汞湿润,然后在搅拌下一次加水至足量,继续搅拌数分钟,红汞即全部溶解。制得的红汞溶液虽含2～3% Preparation of 2% mercuric liquid, due to the mercury Mercury wettability, often easy to form a block after joining and sticky end, resulting in can not be quickly dissolved. We use the following method to prepare faster: Set red mercury in a dry container, add a small amount of ethanol, stirring so that Mercury wetting, and then add enough water to stir a few minutes, stirring was continued for a few minutes, Mercury dissolved. Although the prepared mercury solution containing 2 to 3%