US 12,224,171 B2
Electrospray probe
Leigh Bedford, Ajax (CA); Goran Ristic, Concord (CA); and Bradley B. Schneider, Bradford (CA)
Assigned to DH TECHNOLOGIES DEVELOPMENT PTE. LTD., Singapore (SG)
Appl. No. 17/440,131
Filed by DH Technologies Development PTE. LTD., Singapore (SG)
PCT Filed May 29, 2020, PCT No. PCT/IB2020/055145
§ 371(c)(1), (2) Date Sep. 16, 2021,
PCT Pub. No. WO2020/240510, PCT Pub. Date Dec. 3, 2020.
Claims priority of provisional application 62/855,606, filed on May 31, 2019.
Prior Publication US 2022/0157592 A1, May 19, 2022
Int. Cl. H01J 49/00 (2006.01); G01N 30/72 (2006.01); H01J 49/16 (2006.01)
CPC H01J 49/167 (2013.01) [G01N 30/7266 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electrospray emitter for use in an electrospray ion source, comprising:
a cannula extending from a proximal end having an inlet aperture for receiving a liquid sample containing at least one analyte to a discharge emitter end having an outlet aperture through which charged liquid droplets containing ions of said analyte are discharged, and
an electrically conductive coating covering at least a portion of an external surface and at least a portion of an internal surface of said emitter end, wherein the at least the portion of the external surface of said emitter end and the coating covering the external surface of the emitter end include a tapered tip extending to the outlet aperture of the emitter end.