Determination of Nonvolatile Matter in a Volatile Solvent

Determination of Nonvolatile Matter in a Volatile Solvent

The general procedure for this test involves the following steps:

1. Weighing the sample: A representative sample of the material is weighed accurately and recorded.
2. Evaporation: The sample is then placed in a shallow dish or container and heated in an oven or on a hot plate to evaporate the volatile solvent. The evaporation is continued until the sample has reached a constant weight.
3. Cooling and weighing the residue: After evaporation, the dish is allowed to cool to room temperature in a desiccator and then re-weighed to determine the weight of the nonvolatile residue.
4. Calculation: The nonvolatile matter content is calculated by dividing the weight of the nonvolatile residue by the weight of the original sample and multiplying it by 100. This gives the percentage of nonvolatile matter in the sample.

There are several standards that outline the test method for determining the nonvolatile matter in a volatile solvent. Some of the commonly used standards are:

1. ASTM D2369-20a Standard Test Method for Volatile Content of Coatings: This standard test method covers the determination of the weight of volatile (non-condensable) content of solvent-borne and water-borne coatings.
2. ISO 3251:2019 Paints, varnishes and plastics — Determination of non-volatile-matter content: This International Standard specifies a method for determining the non-volatile-matter content, by mass, of paints, varnishes, and related products.
3. AS/NZS 1580.107.3:1997 Methods of test for paints and related materials — Determination of non-volatile content of paints and varnishes: This standard specifies a method for determining the non-volatile content of paints and varnishes.
4. SSPC-PA2, Procedure for Determining Conformance to Dry Coating Thickness Requirements: This standard is specific to the application of coatings on steel structures and specifies a method for determining the non-volatile content of the coating.

The specific details of the testing procedure may vary depending on the type of material being tested and the specific testing standards being followed.

Read more: Unveiling Non-Volatile Matter: A Closer Look at NVM Analysis 

Video 01: Non-volatile matter ISO 3251

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