The value indicating the acidic or alkalinity of a liquid is the pH. The pH potential in water means hydrogen. The pH of the water indicates the amount of hydrogen mixed with the water.

Karl-Fischer method is one of the most important analysis methods using iodine as an oxidant. This method is used to determine the amount of water in the various substances. The Karl-Fischer solution is a mixture of sulfur dioxide (SO2) and pyridine. When the Fischer solution was first used, pyridine, a toxin, was used. This toxic substance was not used in subsequent solutions and Fischer solutions without pyridine were produced.

Karl-Fischer method of water content and monemer determination processes are among the quality control tests of paint solvents. Karl Fischer titrations are a very important method for analyzing water content. Thanks to its accuracy and ease of use, this method is among the most important water test methods and is referenced in many international standards. It is often preferred because of its low water content in paint solvents.

This method is based on the iodometric reaction between Karl Fischer reagent and trace amounts of water in the sample to be tested.

The Fischer reaction is carried out at a pH between 5-7. When the pH is lower, it becomes difficult to see the turning point. If the pH is higher, side reactions begin to occur and the analysis results are not safe.

The Karl Fischer method is volumetric and coulometric in two ways and both methods are based on an electrochemical reaction. The coulometric method is preferred for determining the amount of water at concentrations less than 100 ppm.

PH spot measurements with the Fischer solution method are important for producing healthy and high quality textiles. In the scope of chemical and ecological tests, the said tests and analyzes are carried out by the authorized laboratories. These studies are based on the following standards:

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