Mass spec - fragmentation an extremely useful result of ei ionization in particular is a mass spectra of various classes of organic compounds 1 saturated hydrocarbons a characteristic m/z 60 peak is often present due to the mclafferty rearrangement. In addition to forming molecular ions, organic molecules decompose into fragment ions in a mass spectrometer as a result, a host of ions form that have a m/z less than that of the molecular ion these ions give rise to the characteristic mass spectrum of the molecule. Mass spectra in a mass spectrometer, a solid or liquid is heated under reduced pressure to convert it into a gas these ions give rise to the characteristic mass spectrum of the molecule the fragmentation pattern of a molecule is characteristic of the molecule, and an unknown compound may be identified by comparison with a catalog of.
Mass spectral interpretation is the method employed to identify the chemical formula, characteristic fragment patterns and possible fragment ions from the mass spectra   mass spectra is a plot of relative abundance against mass-to-charge ratio. Use the back arrow to return to a spectroscopy problem return to mass spectrum home page alkanes: simple alkanes tend to undergo fragmentation by the initial loss of a methyl group to form a (m-15) speciesthis carbocation can then undergo stepwise cleavage down the alkyl chain, expelling neutral two-carbon units (ethene.
Cleavage of bonds next to the carbonyl group (c=o) is a characteristic fragmentation of aldehydes and ketones a common fragment is carbon monoxide (co) but as it is a molecule and thus uncharged it will not produce a peak of its own however, it will mass spectrometry interpretation author.
Mass spectrometry can be used to identify the compound with the help of molecular weight, molecular formula and fragmentation pattern provided from the spectrum it can also be used to distinguish cis and trans ions, analysis of trace elements in minerals and alloys.
Mass spectrometry 1 the mass spectrometer in order to measure the characteristics of individual molecules, a mass spectrometer converts them to ions so that they can be moved about and manipulated by external electric and magnetic fields. In the database of mass spectra of national institute of standards and technology (nist)  one can find that the mass spectral libraries show the mass spectra of large number of mono-, bi- and tricyclic terpenoids, but the mass spectra of terpenoids were not studied in details in this study, the mass spectra of compounds were obtained by the instrument varian 3900/2100t – quadrupole gc-ms (gas chromatography – mass spectrometry) with a source of ions as ion trap 3. The organophosphonate fp-biotin is unique among the op agents in that cid fragmentation in the mass spectrometer yields characteristic masses for both labeled serine and labeled tyrosine. The fragmentation pattern of a molecule is characteristic of the molecule, and an unknown compound may be identified by comparison with a catalog of standard spectra fragment ions are formed through both simple cleavage of larger ions and rearrangements of the molecular ion.
The characteristic fragmentation pathways of angiotensin ii and eight analogues were investigated by electrospray ionization tandem mass spectrometry.
Fragmentation patterns in the mass spectra of organic compounds this page looks at how fragmentation patterns are formed when organic molecules are fed into a mass spectrometer, and how you can get information from the mass spectrum. Electrospray ionization mass spectral characteristics and fragmentation mechanisms of angiotensin ii and its analogues.