生意宝 | 全球化工网 | 韩国化工网 | ChinaChemNet·免费注册 ·用户登录 ·服务中心 
  • 中国化工网首页 >> 化工助手 >> 化学配方数据库



    配方类型: MISCELLANEOUS
    配方说明: Deionized Water as Distilled-Water Substitute
    配制方法: The space, time, and equipment problem for the production of distilled water on a small scale (car batteries, photographic darkrooms, laboratory reagents, etc.) can be eliminated by the use of a small monnobed ionexchange column which will give quickly deionized water of double distilled quality as needed. Such a column is prepared as follows: A glass or plastic tube with a small outlet at one end is packed with a thin layer of glass wool. On top of this, 200 g. of ionexchange resin "MB-1"* is placed, mixed with sufficient "IRA" 400* indicator resin to be visible in the mixture. Ordinary tap water put through this column comes out at the bottom deionized as the equivalent of double distilled.
    As the column becomes exhausted, the "IRA" 400 indicator resin changes color from blue to yellow. When the color change has extended nearly to the length of the column, the mixture should be replaced.
    If desired, the indicator resin may be separately placed in the column on top as a 0.5-inn. thick layer and the

    返回数据库查询
    其他库:化学品法规 中国专利 国际专利 国家标准 国际标准 化学品安全数据库(msds) 外贸常识 合同范本 报关指南 商检指南 国际区号 国家代码