I'm very new to GC-MS. We have 7890B GC with 5977B MSD & 7697A HS. I am tasked with quantifying samples for a known compound. I have run this compound qualitatively to make sure it is in the library and, unfortunately, it is not giving me any positive identifications. The unidentified compounds fall in line from what I have seen through other sources (e.g, PubChem), though. So how can I add this known compound into my own library?