hi everyone,
i am doing gc/ms with cuticular compounds of crickets. at the beginning of the spectra i find peaks with the ions 104 / 183 and 104 / 211. there's no hit in the wiley libary. i thought of phenyl esters first, but now i mentioned that 104 / 183 could be phosphocholine as well. but ain't that way too polar to be detected in gc/ms? has anyone of you an idea what these substances could be or where i could look them up? i am very grateful for every answer. thanks a lot. stefanie