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[求助]
英国药典 制备参比溶液时在对照品后写着（杂质C）是什么意思
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Reference solution (a) Dissolve 50.0 mg of salicylic acid R (impurity C) in the mobile phase and dilute to 50.0 mL with the mobile phase. Dilute 1.0 mL of this solution to 100.0 mL with the mobile phase. 括号里的杂质C是要我们自己加入，加入多少量？还是别的意思？谢谢 |
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2楼2012-09-26 16:21:01