Model
Bruker MicroTOF-Q (2009)
Ion Source
ESI (Electrospray) ou APCI (Atmospheric Pressure Chemical Ionization)
Mass analyzer
tandem - Quadrupole coupled with a time of flight (Tof)
Mass range
illimited in theory
Information
You can see the pseudo molecular ions MH+ and MNa+ (and MK +). The measurement accuracy (less than 5 ppm) and high resolution (R = 15000) provide access to raw formulas. In MS/MS mode, you can obtain structural information.
Principle
In ESI, an electric field charge droplets (solvent + solute) going out of the capillary. The solvent is evaporated by a collision with an inert gas. The droplets are split up to lead completely to ion desolvation and possibly multicharged. In APCI, the molecules are ionized from corona electrode discharge.
Options
Introduction of the sample by liquid chromatography + automatic sample exchanger (Dionex U3000) or direct injection.