求助precursor ion scan是什么意思?在一篇文献中读到Zhang et al.11 have recently developed the precursor ion scan (PIS) method using electrospray ionization-triple quadrupole mass spectrometry (ESI-tqMS) for fast selective detection of polar/highly polar Br-DBPs. In this method, precursor ion scans of m/z 79 and 81 were used to selectively detect the Br-DBPs, and product ion scans were thenperformed to confirm the presence of bromine and provide structure information. 请问precursor ion scans是指扫描母离子?product ion scans是扫描二级离子吗?可是扫描母离子(还没有打碎的情况下)就能够检测中他想找的Br-DBPs化合物中的Br离子吗?一般不都是打碎之后掉落Br离子再提取离子流才能知道吗?还是说precursor ion scans这一种模式就已经用很微弱的碰撞能进行了碎裂?确实不是很懂precursor ion scans这一模式,希望有了解的人帮助解答,谢谢!查看更多4个回答 . 27人已关注