This week, I received the Ag/AgCl electrodes and be able to start measuring plant signal. 1.Make a reference electrodes:  The pellet is Ag/AgCl working tip, silver wire is in place to attach the pellet to a connecting wire/cable. Solder electrode tip to a flexible test wire and banana plug at the other end of the wire.Since pellet tips is sensitive to metal so I use heat shrink tubing to seal the exposed metal threads of the pellet and wire.  Use dual binding post/ BNC adapter to connect electrodes to scilloscope. 2.Set up experiment:  A pair of electrodes is placed 15 cm apart in one leaf of a Aloe Vera plant. The oscilloscope show a potential difference of around 10mV after the connection. The potential difference level changes with changing leaf or distance. Problems: - Signal isn't stable, there are changing due to noises at high sampling frequency. - Have to make sure the change in potential is not due to some constant noise. |
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