In the field of plastics it is very important to determine the percentage of moisture contained in polymers especially for strongly hygroscopic polymers such as nylon (PA).
As for strongly hygroscopic polymers, the processes have to occur at low rate water content in order to avoid variations of final properties of manufactured items.
As for assessing moisture content it is an important rate for quality control of incoming raw materials.
Among all the available methods that can be involved to determine this value, the Karl Fischer method is the most versatile and efficient that coud be involved to meet all the requirements as it is a sensitive test that can trace also small water traces in samples down to a few parts per million.
The instrument process put electrolysis as a basis and it measures the iodine content that is generated stoichiometrically depending on water contained in the sample.