Let’s say I got the following results for GC-MS analysis: How could I choose the correct compound present in my sample?
Joachim Horst
Dear Nimashi Herath,
unfortunately, structural isomers as in your peak list cannot be distinguished by GC-MS using the mass spectra, since the fragmentions that occur are identical in both cases. The only possibility is the retention time, which will probably be different for both proposals, since the polarity of the two molecules will be different, resulting in different retention times. You test this out with appropriate standards.
You can find both spectra of the NIST17 library in the appendix, maybe you can make a prediction about the ratio mass 57/ 206.
Best Regards
Joachim Horst
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