Describe the ionization mechanisms for (a) electron impact (EI) ionization, (b) chemical ionization.


Describe the ionization mechanisms for (a) electron impact (EI) ionization, (b) chemical ionization (CI), (c) electrospray ionization (ESI), and (d) atmospheric-pressure chemical ionization (APCI).

Illustrate the principles of quadrupole-based body analyzer. Why it is also habitually referred to as a body defecate?