Spectra were measured with the external locking mode at various temperatures. chemical shifts were determined on an expanded scale (18 ppm per full scale) with the precision of 0.10 ppm.
这里的 external locking mode和an expanded scale (18 ppm per full scale)都是什么意思啊？
迎国庆送壕礼！十月发帖抢大疆云台
【官方邀请】高效液相色谱使用情况有奖调研
喜迎国庆！第十七届原创大赛超级原创日参赛奖励翻倍
丹纳赫四十周年寄语征集领大礼包
