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[求助] 离子色谱中阴离子柱进了铁离子,怎么清除啊?

各位大侠,我用的是戴安的离子色谱ICS-1500,前几天做方法试验,用到了硫酸亚铁铵,溶液进入AS23的阴离子色谱柱,其中的铁离子和铵离子这些阳离子怎么清除啊?对色谱柱的使用寿命有什么影响吗?
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