回复jzhang发表于：2020/5/27 21:00:43悬赏金额：
15积分 状态：
未解决
美国药典看到这句话：
For each sample, an initial short spectrum is collected (1scan), and the water resonance is then suppressed by selective irradiation during the relaxation delay.
Final Analysis: Proceed as directed in the chapter. spectra are recorded over 32 scans.
求助NMR大神，USP里面这句话怎么理解？
selective irradiation during the relaxation delay.对应的水峰压制程序有哪些？
谢谢
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