Unknown compound identification (quant mass 278)

February 22, 2021, 09:39:24 AM

Hey Everyone,

when I saw the title of this section I was sure that my request fits in here. After reading some of the other post I became sceptical but still I would like to place my question somewhere.

I found some interesting Peaks in my GC-EI-TOF data (MEOX + TMS derivatized polar extracts of natural microbial communities) and the library's couldn't help in understanding the compound I found here. The RI of the requested analyte is 2003.3 and I have a very similar spectrum occuring at RI 2055.2. It seems to me that there one analyte with different configurations (like the sugars) but m/z 278 is a black box for me. Does anyone knows which fragment m/z 278 typically represents? Or can someone help me with the compound class?

You can find the spectrum table of this compound attached to this post. Many thanks for any comment!

Stefan