Mass analyzer is a technique used for the separation of the ions according to mass/charge ratio.
Equation for the Mass analyzer:
1. Lorentz force law:
F=Q(E+v*B)
Where
F = force applied to the ion
Q = ion charge
E = electric field
v*B = the vector cross product of the ion velocity and the magnetic field
2. Newton's second law of motion:
F=ma
Where
F = force applied to the ion
m = mass of the ion
a = acceleration
By combining the above two equations, we get:
Q(E+v*B) = ma
=> E+v*B = a(m/Q)
where m/Q denotes mass to charge ratio.
Types of mass analyzers:
There are various types of mass analyzers:
1. Scanning Mass Analyzers
2. TOF - Mass Analyzers
3. Trapped Ion Mass Analyzers
Monday, January 19, 2009
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