Thanks for the link, but that one tells mostly about proteomics. What would be the aid of MRM when screening small molecules (with the structure known to the analyst), i.e. what info can we get with MRM that cannot be obtained by e.g. PIS or full scan? Is the purpose of MRM to get higher sensitivity, lower the LOD, LOQ, find the better conditions for fragmentation of analytes...?
Sorry if I'm annoying with too many questions.