In the method, a weakly acidic cation exchange resin or a weakly basic anion exchange resin may be used.

使用弱碱性阴离子交换树脂的上述方法等。

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In the method, a weakly acidic cation exchange resin or a weakly basic anion exchange resin may be used.

使用弱碱性阴离子交换树脂的上述方法等。

youdao