The national standard is used to determine the performance of the ion exchange resin. acid and alkali of the old resin can not be limited to the number of times in the treatment of national standard.
运用国标测定离子交换树脂，对旧树脂的酸碱处理不能限于国标中次数，应检验排出液中杂质含量；
3
The is lower than standard electrode potentials of alkali metal elements in the same family;