Unfortunately, the ion-exchange technique traps many more non-radioactive iron ions than radioactive cobalt ones.
遗憾的是，这种离子交换技术所捕获的非放射性铁离子比放射性钴离子还多得多。
METHODS: Osteoblasts cultured in vitro were divided into two groups: control group with normal saline and ion group with cobalt and chromium ions.
方法：体外培养成骨细胞，实验分两组，对照组给予生理盐水，离子组给予钴、铬离子干预。
The catalyst is prepared by sequential precipitation of cobalt with aluminium ions in the presence of an alkaline precipitation agent.
在碱沉淀剂存在下，通过按序沉淀钴与铝离子， 制备催化剂。
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