mass spectrometer Flashcards
1
Q
what does the mass spectrometer provide ?
A
the mass spectrometer provides accurate information about:
- relative isotopic mass (Ar and Mr)
- relative abundance of isotopes
2
Q
what can mass spectrometry be used for ?
A
- to identify elements
- to determine relative molecular mass
3
Q
which peak on a mass spectra is the Molecular ion / parent ion peak? and why ?
A
the peak that is furthest away
because it is the heaviest so it is the Mr
4
Q
what are the other peaks on the mass spectra called and where do they come from ?
A
they are called fragments and they come from fragmentation from the electron gun ionisation.
5
Q
how do you find the mass of 1 ion ?
A
Ar divided by 1000 to get kg of 1 mole and then divide by avogadro’s number to get the mass in kg of 1 atom
