Presentation on fascinating usage of the state-of-the-art precision high voltage power supply from Spruce Science. In this demonstration, high voltage is applied directly to sodium liquid solution to generate tiny sodium droplets. These charged ions are then brought into a gas flame so that you can see the bright yellow light emission. The electrospray ionization coupled with optical emission spectroscopy is an analysis method that can be used to detect alkali metals for example. This analysis method is a great way to detect alkali metals and demonstrate how useful it is to have a precision high voltage power supply that is compact, lightweight and versatile. SpruceScience.com
I hope this demonstration help show you how to electrospray ions using a precision high voltage power supply.
Visit SpruceScience.com for more information.
Electrospray ion source publication by Masamichi Yamashita and John Fenn.
https://pubs.acs.org/doi/abs/10.1021/j150664a002In the video, you will see that when there is no electric field, droplets form at the tip of the needle and drip continuously. As voltage increases and high voltage is applied from the needle, which is carrying a liquid flow, to the ground plate, we get this characteristic formation of what is known as a Taylor cone. That taylor cone is then pulled into a jet. From there, the jet is further disrupted into a series of tiny droplets. You get this characteristic formation when high voltage is balanced with the pumping rate. If the voltage is set too high and field extraction exceeds pumping rate, spraying might be lopsided or causes arcing. However, if the applied electric field is too low then it leads to instability. For performance tuning, having an adjustable precision high voltage power supply is essential.