The ASTM D4017-22 standard provides a test method for the determination of water content in paints and coatings by the Karl Fischer method. This method is suitable for a variety of coatings, including Resin, monomers, and solvents, but is not suitable for samples containing alaldehyde and certain metal oxides. Since coatings are often insoluble in traditional Karl Fischer solvents, this standard recommends the use of pyridine and 1-ethylpiperidine as catalysts to increase Test speed. This standard helps to precisely control the moisture in coatings, which affects their performance and vocs content.