ISO 23168:2019 describes how to measure the water content of raw materials and water-borne coating components using a gas chromatograph. This test method can be utilized outside its suggested operating range of 15% to 90% of the water mass fraction. MaTestLab is one of the best testing service providers, with the best network of testing laboratories in the USA to carry out ISO 23168:2019 tests for our clients.
ISO 23168:2019 Test Method
| Gas chromatography | The injection volume and split ratio must be coordinated to stay within the detector’s linear range and avoid going over the column’s capacity. Asymmetrical peaks will indicate that the gas-chromatographic system is overloaded. |
| Determining the Water content of the dilution solvent | Karl Fischer titration method is used to determine the amount of water in the dilution solvent |
| Quantitative determination of water content | The “ready for use” sample must be injected into the gas chromatograph in amounts between 0.1 and 1 μl, and the chromatogram must be recorded. Next, the internal standard and the water peak locations must be identified. |
ISO 23168:2019 Test Specimens
| Specimen Detail | The sample’s mass is determined by the anticipated water content. |
| Specimen Size | The recommended procedure is to weigh the sample to the nearest 0.1 mg and add about 0.4 g of the internal standard to the sample vial. Additionally, weigh 10.0 g of dilution solvent to the nearest 0.1 mg and transfer it to the same vial. |
