Falling liquid drop from a disposable syringe through the end of 1/16″ O.D. peek tube (Upchurch scientific, WA) attached to the syringe, is manually dropped to the slope acrylic plane (7×13×0.1 cm3) covered with Teflon tape (1.9×15×0.1 mm3; normally used for plumbing). The end of the peek tube is set to have ~1 cm space above the Teflon plane. The liquid drop of sample, having a volume of ~25 µL, would move due to gravity force along this hydrophobic tape to the electrode system and would attach, due to adhesive force of aqueous drop and hydrophilic surface of glass, to the end of hydrophilic surface of disposable glass dropper of the auxiliary electrode which is set ~2 mm above Teflon tape. After a drop of the reagent (a mixture of iodide and starch) from another syringe falls down and moves along the path, it stops and merges with the sample drop. By this, the total volume would become ~50 µL. The whole drop still hangs on the glass auxiliary electrode. When, another drop (water from the third syringe) comes to merge, the gravitational force of the whole liquid drop becomes high enough to make the drop detach and moves out from the glass auxiliary electrode. One factor affecting manipulation of liquid drop in this format also involves the angle of tilt sheet. The tilt sheet in a higher slope position results in faster movement of the drop along the hydrophobic path. If it is in too high slope, it would not be easy to control the movement and also the drop will not be easy to stop at the electrode. The angle would be adjusted to meet the ability in manipulating the liquid drop. In this experiment, the suitable tile sheet angle was found to be ~50° from horizontal plane. The tilt sheet angle was estimated by applying basic trigonometry.