I am running some GC-MS samples that have been derivatized using BSTFA. Is there an option in ChemStation (or an open source software) to automatically adjust the m/z values for compounds based on the number of activated hydrogens a compound has, and subsequently search the spectra to ID derivatized compounds, similarly to what you can do if they were underivatized? It seems like a huge hassle to do this for each compound manually