Insulated needle for forming an electrospray
AssigneeMillipore Corporation
InventorsDouglas P. Wittmer, Michael J. Tomany, Joseph A. Jarell
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Abstract
An electrically insulated needle tip is provided for forming an electrospray from a solution containing a solute sample. The insulated needle tip is positioned between an upstream electrode and a downstream counterelectrode. The solution passes through the needle, emerges from the insulated tip and is converted to an electrospray under the influence of an electric field generated between the electrode and the counterelectrode.
Claims10
A needle apparatus for converting a liquid into an electrospray comprising electrically charged liquid droplets, said needle apparatus having an entrance end and an exit end,
- means for introducing said liquid into said entrance end,
- an inner electrically conductive capillary in liquid communication with said entrance end having a liquid outlet,
- an outer electrically nonconductive tube surrounding said electrically conductive capillary and said liquid outlet of said electrically conductive capillary to electrically insulate said liquid outlet from atmosphere surrounding said needle apparatus.
- said nonconductive tube having an liquid outlet comprising said exit end and
- means for effecting an electrical potential on said electrically conductive capillary.
A needle apparatus for converting a liquid into an electrospray comprising electrically charged liquid droplets, said needle apparatus having an entrance end and an exit end,
- means for introducing said liquid into said entrance end,
- an electrically nonconductive capillary in liquid communication with said entrance end, said electrically nonconductive capillary having a liquid outlet comprising said exit end and
- means for effecting an electrical potential on liquid at said entrance end of said electrically nonconductive capillary.
Dependencies are inferred from the claim text.