Introduction to PH electrode
There are usually two methods for measuring the pH value of aqueous solutions: colorimetric method (pH test paper and colorimetric dish) and potentiometric method. Potentiometry is a method that enables continuous online measurement and process monitoring, and can obtain pH values with reproducible results. The core theory of pH electrode measurement is the Nernst equation.
The electrode used in potentiometric analysis is called a primary cell. A primary battery is a system that converts chemical reaction energy into electrical energy. The voltage of this battery is called electromotive force (EMF). This electromotive force (EMF) is composed of two and a half cells. One of the half cells is called the measuring electrode, and its potential is related to a specific ion activity; The other half cell is a reference half cell, commonly referred to as a reference electrode, which is typically connected to the measuring solution and to the measuring instrument. The most familiar and commonly used pH indicator electrode is a glass electrode.
A set of industrial online pH measurement system usually consists of four parts: pH sensor, pH electrode, pH transmitter, electrode sheath, and cable.
PH electrodeProduct Features
1. Adopting advanced solid dielectric and large-area polytetrafluoroethylene liquid interface. Not easy to block, easy to maintain.
2. The long-distance reference diffusion pathway greatly extends the service life of the electrode in harsh environments.
3. The newly designed glass bubble has increased the bubble area, which can prevent interference with the generation of bubbles in the internal buffer solution and make the measurement more reliable.
4. The electrode adopts low-noise cable, which can ensure signal output length greater than 20 meters without interference.
PH electrodeTechnical specifications:
Materials: PPO (polyphenylene oxide), PPS (polyethylene ether), ABS, etc
Scope of application:
Electroplating wastewater, chemical wastewater, acid washing wastewater, pharmaceutical wastewater, printing and dyeing wastewater, papermaking wastewater, desulfurization wastewater, and pure water industry.
PH electrodePurpose of use
At the beginning, people's awareness of acidity and alkalinity was based on the taste of the food they ate. For example, vinegar is sour, lemon is also sour, and the astringent taste of alkali noodles is alkaline. This is the origin of pH or acidity, which is simple and intuitive.
The hydrogen ion concentration in the aqueous solution is expressed in terms of molar value, ranging from 100 (1) to 10-14, and then converted to a negative logarithm based on 10. The pH range is 0-14. PH is the abbreviation for pondush hydropenii in Latin, pondus=pressure, hydrogeni=hydrogen. Therefore, a more accurate definition of pH value should be the negative logarithm of hydrogen ion activity in aqueous solutions, and understanding this is crucial. You can therefore understand that *: relatively speaking, pH measurement is easier to achieve in liquids, and secondly, pH measurement is easier to achieve in aqueous solution environments.
Moreover, most pH measurements in daily life, work, and production revolve around liquids. For example, most of the food, drugs and liquids consumed by human beings are liquids, even if the final product is not liquid, its source environment is also liquid. For example, there are many liquid foods for human beings: Baijiu, beer, carbonated drinks, fruit juice, coffee and tea. pH value affects the flavor and quality of food, and pH value is an important indicator in drug production. However, pH value detection is not simple. There are many more liquid substances in industrial pharmaceutical production than solid substances (which makes it easy to understand the importance of industrial water). Common industrial water includes cooling water, cleaning water, heating water, steam and solvent water, etc. In addition, it also includes wastewater that needs further environmental protection treatment. So, in industrial production, substances undergo various changes, and a considerable part of the reactions are accompanied by changes in hydrogen ion concentration. Therefore, it is particularly important to detect the magnitude of hydrogen ion concentration, i.e. pH value, in aqueous solutions.
PH measurement can help achieve:
1. Produce the products we expect to want
2. Produce as much as possible with *
3. Prevent material damage, personnel injury, and environmental pollution
4. Meet regulatory requirements
5. The research and development work is progressing smoothly
