Mass spectrometry
The study of matter through formation of gas-phase ions that are detected and characterized by their mass and charge
Mass and charge
The nucleons are composed of smaller entities known as quarks; these are designated as up-quarks or down-quarks and give nucleons their distinct properties
mass and charge (contd)
When an entity that possesses a charge moves, it generates a small magnetic field (known as magnetic moment) in accordance with Coulombs Law
what does this mean?
This means that movement of protons can be affected by external magnetic fields
What forces will act upon what in MS
If we have 2 species with the same charge but different mass, they will experience centripetal and lorenz forces, which gives rise to the mass-charge ratio.
In context of mass/charge ratio
Ions with different masses are formed. The velocity of the ions is accelerated across a potential difference (+ to -). Key equation: v= (square root) 2zeV/m
Mass charge ratio (contd)
The ions then pass through a magnetic field which deflects them through a circular path. They therefore experince the centripetal and lorenz forces. Key equation: v = zeBr/m
What are nucleons composed of?
smaller entities called quarks, designated as up-quarks and down-quarks.
What do qaurks give nucleons?
Their distinct properties
what happens when an entity that possesses a charge moves?
It generates a small magnetic field (called magnetic moment) in accordance with Coulombs Law.
Mass charge overall ratio
can be rearranged to make m/z the subject: m/z = eB2r2/2V
Increasing radius
Larger m/z
