In high-voltage insulation, the polymer material must have excellent dielectric properties, in which trace moisture in the polymer plays an important role, the moisture in the insulation material reaches a certain level, and the pores are easily generated in the insulation material during extrusion, resulting in The cable is unqualified or even broken down. Especially in XLPE ultra-high voltage cables, moisture has an important influence on processing and long-term performance, and the moisture content in XLPE must be strictly controlled. Therefore, the establishment of accurate test methods has become a common concern for both production and use units.
There are many methods for the determination of trace water in liquid and gas samples, and there are many standard analytical methods and styling instruments. Among them, the Karl Fischer method is the most accurate chemical method for determining moisture. The gas chromatography method is fast and non-toxic. The fine-grained solid sample can be directly poured into the titration cell and measured by the Karl Fischer method. After the measurement, the used waste liquid is discharged.
The MA-2A Automatic Trace Moisture Analyzer is a micro moisture analyzer based on the Karl Fischer Coulomb principle and has a wide application base in the laboratory.
This method can also be used for the determination of moisture in other polymers.
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