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citylack(金币+5): 非常感谢 2011-05-24 00:44:03

H3PO4和HF都不是完全电离，浓度的波动，温度的变化，对最终的pH都有影响，楼主也不用太纠结了。再说，文献上才用的药品品质可能和你的相差比较大呢？

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