CleanAir Engineering has adapted Method 24 to a myriad of CASE and other industry materials. Some of these have included:
- Baby wipes
- Newspaper ink
- Epoxy resins
- Gummy bears
The method is known and documented to have large measurement errors, especially with coatings with VOC contents below 50 g/L (about 5% by mass). The major sources of error are generally in the water and non-volatile determinations. Clean Air has had many successes in determining the concentrations of these components using a proprietary technique. EPA Method 204A is an optional method for determining the VOC content in CASE industries. The errors Method 24 has with low VOC coatings are not a factor with this test method. In Method 204A, a small portion of the coating is loaded into a heated chamber and VOC content of the off-gasses are determined using a Total Hydrocarbon analyzer.