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11Â¥: Originally posted by YBMCL at 2012-11-22 11:11:12
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12Â¥: Originally posted by caijing0343725 at 2012-11-22 11:22:53
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3Â¥: Originally posted by catwithdog at 2012-11-22 03:35:27
For your reference:
For impurity ID, you can use MS, NMR, HPLC, IR, UV. Most of time you need at least 2 methods. If you have that impurity ( ÔÓÖÊ ) reference standard, you can run HPLC to compare t ...

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