Long term monitoring of potassium ions

At ZP we are in a continuous mode of improving our sensors. In this recent effort we have studied our potassium sensors for longer period to see the drift as  a function of time.

In the adjacent experiment a ZP potassium sensors were tested at three concentrations of 0.1 mM, 1 mM and 10 mM potassium ion concentration. The sensor was tested this way in three consecutive experiments, within a 45 minute period - see adjacent image.


The sensor was taken out of solution between each experiment (trial) and in this study the sensors showed a change between each trial -  see adjacent image.


We zoomed in on the data at 1 mM potassium to understand the drift on the sensors - see adjacent image.

 

We were able to determine that the potassium sensor showed a change in sensitivity of approximately 6 % per hour when in a constant concentration solution of potassium ions of 1 mM .


The importance of sensor drift on a potassium ion sensor (ISE) depends on the application, if you have any commercial or technical questions regarding Zimmer and Peacock's potassium ISE then please don't hesitate to contact us.

www.zimmerpeacock.com 2018