This section provides an overview for automatic potentiometric titrator as well as their applications and principles. Also, please take a look at the list of 10 automatic potentiometric titrators manufacturers and their company rankings.
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An automatic potentiometric titrator is a device that automatically performs titration, determination of equivalent point, and concentration calculation in titration analysis. By adding functions such as sample weighing and continuous measurement of multiple samples, a large amount of samples can be analyzed efficiently.
Manual titration analysis is prone to individual errors in judging the equivalent point and visually confirming titration volume.
Titration is classified into four categories according to the type of chemical reaction used: neutralization titration, chelatometry, precipitation titration, and redox titration. Automatic titrators are mainly used for quality control, inspection, and testing where these titrations are required.
For example, neutralization titration is used for quality control of food and beverages, such as fruit juice.
Chelatometric titration, which is based on coordination to metals, is used not only in industries that handle metals, but also in the measurement of water hardness.
Precipitation titration is used to measure the salt concentration in food products and to determine the chloride content in peritoneal dialysis fluid.
In particular, titration technology is indispensable in the field of surface treatment (plating) and plays an important role in the development of new functional materials, miniaturization, and energy-saving technology.
Titration is an analytical technique in which a standard solution whose concentration is already known is dropped into a solution containing a target component for quantification, and the amount of the target component for quantification is calculated based on the chemical reaction of these solutions.
In manual titration analysis, an indicator is added to determine the equivalent point, whereas an electrochemical sensor (electrode) is used in an automatic titrator.
Glass, platinum, and silver electrodes are used as sensors. Sensors are used according to the method used to determine the equivalent point, and titration modes include potentiometric titration, luminometric titration, polarization titration, and coulometric titration.
In potentiometric titration, the most frequently used mode, the change in potential difference between two sensors immersed in a solution is observed. For example, in neutralization titration, when two sensors are immersed in a mixture of target solution and standard solution, a potential difference proportional to the pH difference between the two solutions is generated. Since no potential difference is generated at the point where the pH of both solutions are equal, the point of equivalence can be determined.
In addition, color change by indicator is used for luminometric titration, current change by titration is used for polarimetric titration, and the equivalent point is determined by the amount of current based on Faraday's law for potentiometric titration.
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