Name: 10 points) A sample of an unsaturated FAME is analyzed with Gc-Ms and two

Question

Name: 10 points) A sample of an unsaturated FAME is analyzed with Gc-Ms and two different mass B. ntation patterns were collected from the peak shown below. The pattern on the left represents he retention time marked A and the pattern on the right represents the retention time marked 2151 Explain why on one side of the peak (A) the molecular ion is 294 and on the other side of the peak (B the molecular ion peak is 296. What structural difference would create this mass difference? Why do they not come out as separate peaks on the GC? In order to resolve the peak your supervisor suggests the following strategies, please answer to the be of your ability how this will impact future A) The sample run is extended for a longer time (no other changes to method) B) The method is altered to have a slower temperature ramp rate Thn mmnlp reacted with bromine prior to injecting it in the GC-MS

Explanation / Answer

answer to the first question

the difference in molecular ion peak in GCMS is due to presence of different isotope. such as Cl (35 and 37) or bromine (79 and 81) have two mazor isotope. and thus in GCMS, in different time frame different molecular ion peak will observed.

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