Online pH electrodeThe main reason for the breakage of glass bubbles is due to external forces such as collision and compression. The common practice for online pH electrodes is to stir the electrode as a stirring rod during measurement. Careful cleaning, drying, and capping during use are necessary to avoid excessive force and potential breakage. After it breaks, this electrode is probably unusable and needs to be re selected.
Online pH electrodeThe use and maintenance of
1. The online pH electrode must be calibrated with a standard buffer solution with a known pH value before measurement. To improve measurement accuracy, the pH value of the buffer solution should be reliable, and the closer it is to the measured value, the better, generally not exceeding 3 PH.
2. The sensitive glass bulb at the front end of the online pH electrode should not come into contact with hard objects, as any damage or scratching will cause the electrode to fail.
3. The pole socket must be kept highly clean and dry. If it is contaminated, it can be wiped clean with medical cotton and blown dry to prevent short circuits at both ends of the output, otherwise it will cause measurement errors or failures.
4. Before measurement, attention should be paid to throwing away the bubbles inside the glass bubble, otherwise it will cause measurement errors. During measurement, the electrode should be stirred in the test solution and placed still to accelerate the response.
5. Before and after measurement, deionized water should be used for cleaningOnline pH electrodeTo ensure measurement accuracy, after measuring in viscous samples, the electrode needs to be repeatedly rinsed with hot deionized water multiple times to remove the sample stuck to the glass film, or cleaned with a suitable solvent first, and then rinsed with deionized water to remove the solvent.
6Online pH electrodeAfter long-term use, passivation will occur due to a decrease in sensitivity gradient, slow response, and inaccurate readings. At this time, the bottom ball of the online pH electrode can be soaked in dilute hydrochloric acid for 24 hours, and then soaked in the solution for several hours, or soaked in hydrofluoric acid for 3-5 seconds, washed with distilled water, and then soaked in the solution for several hours to restore its performance.
7. Glass bulb contamination or liquid interface blockage can also passivate the online pH electrode. At this time, appropriate solution cleaning should be carried out according to the properties of the pollutant.