What are the prerequisites for testing water-based paints in the voc release environment chamber?
Water-based coatings need to pass the VOC release test before leaving the factory. The VOC release environment chamber is required to test whether the VOC meets the national standard. Let's take a look at what preparations need to be done before testing the VOC.
Preparation of equipment and samples:
Test sample: water-based paint
Test equipment: VOC release environment chamber
Equipment model: HYV-1000
Equipment manufacturer: Huanyi Instrument
Material preparation:
1. Carrier gas: high purity nitrogen
2. Gas: hydrogen, purity > 99.995 %
3. Supporting gas: air
Reagent preparation:
1. Methane gas
2. Diethyl adipate (DEA)
3. Dilution solvent: Use an organic solvent suitable for diluting the sample, with a purity of at least 99%, but not containing any substances that interfere with the determination, such as substances that cause overlapping peaks on the chromatogram. Tests with solvent injection alone should be performed to observe contaminants and possible interfering peaks. When the sample contains the same components as the dilution solvent, other types of dilution solvents should be replaced. For example, solvents such as methanol and tetrahydrofuran, etc.
Instrument preparation:
1. Gas chromatograph: A gas chromatograph equipped with a hydrogen flame ionization detector.
2. Column 1 (basic column): 6% nitrile propylphenyl/94% polydimethylsiloxane capillary column, such as DB-1301, 60 m*0.32 mm inner diameter*1.0 μm film thickness.
Column 2 (confirmation column): polyvinyl alcohol (wax) capillary column, such as DB-wax, 30m*0.25mm inner diameter*0.25μm film thickness.
3. Micro syringe, 5 μL.
The above are the prerequisites for testing water-based coatings in the VOC release environment chamber. If you have any questions, please visit the official website to contact relevant technical personnel.
