Newsletter December 14

Welcome to this week's newsletter from Zimmer and Peacock. This newsletter is a mixture of news, stories and tech notes from Zimmer and Peacock. If you want to subscribe to our newsletter or have any questions regarding Zimmer and Peacock and our passion for biosensor technologies please don't hesitate to contact us.

Chilli Sauces tested in production on ZP Chilli Sensors

 

ZP is delighted that many of our clients are now using the ZP ChilliPot to test their products as part of the QC in production.

ZP - fixing problems with sensors and biosensors

 

THE PROBLEM

At Zimmer and Peacock we develop electrochemical sensors, biosensors and medical diagnostics;  something that is rarely mentioned both in the academic or industrial setting is the reference electrode. Often the reference electrode is silver/silver chloride, but the term not often used but which should be accurately applied is pseudo reference electrode.

 

What this means is that the reference electrode is only a reference electrode under certain conditions  of stable chloride concentration.  In many applications chloride can be considered to be stable and repeatable, for example the chloride concentration in blood, plasma, serum, interstitial fluid etc the chloride concentration is around 135 to 150 mM. In other applications such as urine analysis, water testing, food testing etc, the chloride concentration maybe unknown and maybe a variable. The issue  is that a silver/silver chloride reference electrode has a potential that is effected by the sample's chloride concentration,  this is shown in the image below.

 

The effect of having a pseudo reference electrode is that sensors based on amperometry potentiometry, voltammetry, etc many not function as expected if the chloride concentration is unknown and variable. Read our solution on our website here

How to collect sweat for on skin analysis?

 

Zimmer and Peacock has the world's only off-the-shelf platform for analysing sweat, be it glucose, lactate, sodium, oxygen, chloride or pH. In the adjacent video we show you a configuration for collecting sweat and moving the sweat over a sensor.

ZP BioMed Devices 2018 San Jose

 

Thank you for talking to us at BioMed Devices San Jose 2018.

 

At the conference we spoke about sensors for potassium, sodium, pH, glucose, lactate, oxygen, etc.

 

We talked about wearable sensors and detecting analytes in urine, plasma, sweat and blood.

 

If you have any questions regarding Zimmer and Peacock please don't hesitate to contact us.

www.zimmerpeacock.com 2019