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答:英国药典1980年版附录Ⅷ中,重金属限度检查试验C项加25%(W/V)硫酸镁的硫酸溶液4 ml,其目的在于除去硅酸。
A: The 1980 edition of the British Pharmacopoeia Appendix Ⅷ, check the limits of heavy metals C plus 25% (W / V) sulfuric acid solution of magnesium sulfate 4 ml, the purpose is to remove silicic acid.