Patent ID: 9412577
Filing Date: 2016-08-09
CPC Classification: G01N,H01J

Claim Text:
1. An ion source, comprising: an ultraviolet light source for providing an ultraviolet light beam into an ion source chamber; and wherein the ion source chamber comprises: a first conduit for introducing a reagent gas into a reactant ion region; a second conduit for introducing a sample gas comprising an analyte into a sample ion region; a plurality of electrodes arranged along a path of the ultraviolet light beam, comprising an ion acceleration electrode, an ion repulsion electrode, an ion extraction electrode, and a differential interface electrode configured to be disposed at an interface with a mass analyzer; wherein the reactant ion region is located between the ion acceleration electrode and the ion repulsion electrode wherein reactant ions are generated by ionization of the reagent gas; wherein the sample ion region is located between the ion repulsion electrode and the differential interface electrode wherein analyte ions are generated by photoionization of the analyte, by chemical ionization between the reactant ions and the analyte, or both, and wherein the sample ion region is downstream from the reactant ion region along a direction of the ultraviolet light beam.