Original post by YsfAli
Can som1 please explain this to me. Much appreciated
How does a mass spectrometer ionise the sample?
Original post by samb1234
How does a mass spectrometer ionise the sample?
high voltage is applied which causes particles to lose an electron which produces positively charged ions
Original post by YsfAli
high voltage is applied which causes particles to lose an electron which produces positively charged ions
What would happen if it produced a 2+ charge ion?
Original post by YsfAli
high voltage is applied which causes particles to lose an electron which produces positively charged ions
Not quite. There is a metal coil which is emitting high speed electrons, which can essentially 'knock off' electrons in the sample making positively charged ions. What could happen if more than one of the high speed electrons collided with the sample?
Original post by charco
What would happen if it produced a 2+ charge ion?
2 e- knocked off
Original post by samb1234
Not quite. There is a metal coil which is emitting high speed electrons, which can essentially 'knock off' electrons in the sample making positively charged ions. What could happen if more than one of the high speed electrons collided with the sample?
2 electrons would be knocked off
Original post by YsfAli
2 e- knocked off
yes, but what would happen to the ion in the MS
Original post by YsfAli
2 electrons would be knocked off
So if m/z is mass to charge ratio, how would this affect the m/z value
Original post by samb1234
So if m/z is mass to charge ratio, how would this affect the m/z value
lighter ions hit the detector first
Original post by YsfAli
lighter ions hit the detector first
If i had an ion of mass 100 and charge 2+, what would be the m/z value? how can we apply that to explain the question
Original post by samb1234
If i had an ion of mass 100 and charge 2+, what would be the m/z value? how can we apply that to explain the question
oh okay, so the 84kr isotope loses 2 electrons would produce the peak of 42kr?
Original post by YsfAli
oh okay, so the 84kr isotope loses 2 electrons would produce the peak of 42kr?
yes. Because the mass would be 84, the charge would be 2+ so m/z =84/2 =42
Original post by samb1234
yes. Because the mass would be 84, the charge would be 2+ so m/z =84/2 =42
thanks,
dont know whats wrong with me today, most prob sleep deprived 
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