Skip to main content

How to extend the life of the reference electrode?

How to extend the life of the reference electrode? 

When you strictly follow the precautions for the reference electrode, you can extend the life of the reference electrode. You can refer to the following points:

1. During measurement, the reference electrode salt bridge liquid level should be (2-3) cm higher than the interface to be tested to prevent the liquid to be tested from diffusing into the reference electrode. For example, the liquid to be tested contains chlorides, sulfides and complexes. The inward diffusion of mixtures, silver salts and perchlorates will affect the potential of the reference electrode.

2. The filling liquid inside the reference electrode needs to be replaced frequently. The filling solution needs to choose the ratio of analytical pure reagent and DI water.

3. The electrode potential of SCE has a large negative temperature coefficient and thermal hysteresis, so try to prevent the large fluctuation of SCE temperature during measurement. The operating temperature of the calomel electrode should not exceed 70°. If the electrolyte environment exceeds 70°, a silver-silver chloride reference electrode should be used.

4. It should be noted that the silver chloride reference electrode is sensitive to light. When using and storing, it is necessary to avoid light as much as possible.

5. The preservation of the reference electrode is very important. When not in use for a short time, it can be immersed in saturated potassium chloride solution, which can prevent the clogging of the liquid-contact ceramic core and maintain the liquid-contact ceramic core in a normal working state. Never store in DI water. When the reference electrode is not used for a long time, it needs to be replaced with a new filling solution, plugged with a rubber cap, and stored in the dark.


Popular posts from this blog

What is the CO2RR Gas Diffusion Flow Cell?

The CO2RR Gas Diffusion Flow Cell (CO2RR GDFC) is a type of electrochemical cell used in the conversion of carbon dioxide (CO2) to other chemicals through a process called the CO2 reduction reaction (CO2RR). It is similar in design to the Gas Diffusion Flow Cell (GDFC) used to measure gas permeability, but it is specifically designed to facilitate the electrochemical reduction of CO2. The CO2RR GDFC consists of a small, sealed chamber with two compartments separated by a thin, gas-permeable membrane. One compartment is filled with a CO2-containing gas mixture, while the other compartment contains an electrolyte solution and a catalyst material, such as copper or silver, which facilitates the CO2RR. The two compartments are separated by the gas-permeable membrane, which allows CO2 to diffuse from the high concentration compartment to the low concentration compartment. The CO2RR is driven by an electric potential applied across the two compartments, which induces the reduction of CO2 int

What is the Gas Diffusion Layer (GDL)?

      The GDL is a porous structure made by weaving carbon fibers into a carbon cloth (e.g. GDL-CT and ELAT) or by pressing carbon fibers together into a carbon paper.  Many of the standard GDLs that are produced today come with a Micro Porous layer (MPL) and hydrophobic treatment (PTFE).  The MPL and PTFE help with the contact to the membrane and with water management.  The MPL typically provides a smooth layer with plenty of surface area for catalyst and good contact with the membrane.  The MPL often uses PTFE as a binder that increases hydrophobicity, which helps keep the water within the membrane from escaping – drying out the membrane and causing higher resistance (lower performance).  There is often an additional PTFE coating on the MPL surface to further augment this. What Exactly Does a Gas Diffusion Layer (GDL) Do? GDL essentially acts as an electrode that facilitates diffusion of reactants across the catalyst layered membrane. The surface area and porosity of the GDL is what

How to do when the mercury oxide reference electrode broken?

Q: How to do when the mercury oxide reference electrode broken? A:  If the electrode is broken, please be sure to operate in accordance with the laboratory hazardous chemical treatment method to avoid the diffusion of mercury oxide, which is a toxic material. Description of the mercury oxide reference electrode: The mercury-mercury oxide(Hg/HgO) reference electrode is mainly used in alkaline solutions. It is an electrode composed of metallic mercury and its insoluble salt HgO and 1M KOH solution. Its electrode potential is 0.098V (25°C). The salt bridge of the Hg/HgO reference electrode is made of glass and PTFE, and the size is φ6*70mm. This size can be matched with various types of Dek Research electrochemical cells. Special attention should be paid to maintenance and storage when using the Hg/HgO reference electrode. The substance containing mercury oxide is a toxic substance, and the salt bridge solution is corrosive. Please strictly abide by the relevant laboratory safety regulati