Measuring the pH of deionised water is about the most difficult application to handle. Most results are incorrect and very few ever endpoint. The issue is there is no conductivity and therefore the two half cells (pH and reference) cannot effectively communicate. One potential is basically subtracted from the other. If any one or both are… Continue reading How do you measure the pH of deionised water?
Author: cgadmin
Top tips for ion selective electrode (ISE) calibrations and measurements
An ISE calibration requires elimination of any contamination and good laboratory practice. See below our top tips on ISE calibration: Keep fingers off the inside of your glassware! It is very important that the glassware you use in analytically clean, even if they have been through an autoclave, if any finger prints are on the inside the… Continue reading Top tips for ion selective electrode (ISE) calibrations and measurements
How to add a custom buffer to the TRUEscience app
TRUEscience have created buffers which have a QR code on each bottle which, when scanned into the app, automatically loads the batch information, expiry date, re-order information, MSDS sheets and certificates of analysis. If you want to use your own buffers with the TRUEscience system, you can load this information manually using the 5 simple… Continue reading How to add a custom buffer to the TRUEscience app
How do you calibrate ion selective electrodes?
Like all electrochemistry meters it is vital you calibrate your meter before use to maintain accurate and reliable measurements. As low concentration ISE standards are unstable, the most common method of calibration is to dilute a 1000ppm standard into at least 2, preferably 3 concentrations that bracket your expected sample concentration. Ideally the standards should be a… Continue reading How do you calibrate ion selective electrodes?
Measuring pH of low ionic strength solutions
pH meters use the amount of dissolved salts in a solution to make measurement. With plenty of salts, measurements can be made using an electrode and meter quickly and precisely. Samples without those salts, with low ionic strength and conductivity such as pure water, can make measurement difficult. Care needs to be taken in order to… Continue reading Measuring pH of low ionic strength solutions
New App Update! August 2017
We’ve made the TRUEscience app available for more devices than ever before. As well as being able to use it on your Android tablet, the app now supports Android phones and is compatible with another 6500 devices. Thanks to your feedback we’ve been able to make some important changes, adding new features and improving app functionality. So,… Continue reading New App Update! August 2017
TRUEscience wins the 2017 S-Lab Innovation Award for Best New Product
At the S-Lab Exhibition and Awards in York this May 2017, the TRUEscience smart pH meter won the award for Best New Product. Over the two day exhibition lab managers and technicians came to see the smart pH meter working on stand, and the team were proud to receive the award at the evening awards… Continue reading TRUEscience wins the 2017 S-Lab Innovation Award for Best New Product
How does temperature affect pH?
When measuring pH it’s important to also measure the temperature of the solution, as pH varies greatly with temperature. Many pH meters have a separate temperature sensor and Automatic Temperature Compensation (or “ATC”) built in to help with this. But how does pH change with temperature?And why does temperature have such a great effect on… Continue reading How does temperature affect pH?
How should I store my pH electrode?
The pH electrode is the most delicate part of any pH meter system, but proper care and maintenance will ensure it stays in good condition and gives fast and accurate results. Storage of pH electrodes is one area which is often misunderstood, and can easily damage the electrode beyond repair if it is done incorrectly.… Continue reading How should I store my pH electrode?
How to choose a pH electrode
With pH electrodes available in such a wide variety of shapes, sizes and materials it can be difficult knowing where to begin to choose one. We’ve looked at the key questions you need to ask when choosing a new pH electrode, and put together a table highlighting some common applications and the best electrode for… Continue reading How to choose a pH electrode