Patent ID: 7075066

Claim:
An apparatus for providing a voltage differential to a fluid for an electrospray application comprising: a first tube; a first conductive junction having first and second ends, wherein the first end of the first conductive junction is in fluid communication with one end of the first tube, and said first junction is adapted to apply a first voltage to a fluid flowing therethrough; an insulating connector having a fused silica capillary tube located at least partially therein and wherein the capillary tube has two ends and a first of the ends of the capillary tube is in fluid communication with the second end of the first conductive junction; a second conductive junction having first and second ends, wherein the first end of the second conductive junction is in fluid communication with the second end of the capillary tube, and said second junction is adapted to apply a second voltage to the fluid; and a second tube having a first end and a second end wherein the first end of the tube is in fluid communication with the second end of the second conductive junction and the second end of the tube is tapered.