Data acquired from GC-MS was imported into Masshunter and was deconvolved to find compounds. Next, when I click on that entity, it was showed in [compound MS spectrum results] as :.So, I don't know the difference between the meaning of the two definitions in red circles here. Can I understand that the upper one is the spectrum of the identified compound, and the lower one means every fragment scanned by EI?
Next, I right click and search using NIST-MS program, sometimes it doesn't show valid compounds, unless I double click the area in red circle, why? Do I make a mistake when I use Masshunter or NIST-MS?
Thank you in advance.