Method and apparatus for improved electrospray emitter lifetime
US11087964B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2019 |
| Grant date | Aug 10, 2021 |
| Priority date | — |
| Expiry date | Nov 21, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB08B2203/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for cleaning an electrospray emitter of a mass spectrometer, comprises: (a) changing a mode of operation of the electrospray emitter from a stable jet mode of operation to a dripping mode or a pulsating mode of operation by lowering a magnitude of a voltage applied between an counter electrode and the electrospray emitter; (b) causing a cleaning solvent to flow through the electrospray emitter at least until a droplet of the cleaning solvent forms on an exterior surface of the electrospray emitter while operating the electrospray emitter in the dripping mode of operation; and (c) causing the droplet to dislodge from the electrospray emitter exterior.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.