This document is one of a series of standards dealing with the sampling and testing of coating materials and their raw materials.

This document is applicable to the determination of VOC content if the cases are as follows:

Case 1: single-pack coating materials other than case 3-and the expected VOC content is greater than a mass fraction of 5 % which cannot be measured by ISO 11890-2 due to chemical reactions;

Case 2: multi-pack coating materials other than case 3, including-coating materials containing reactive diluent, and the expected VOC content is greater than a mass fraction of 1 % ;

Case 3: radiation curable coating materials and the expected VOC content is greater than a mass fraction of 5 %; . Radiation curable coating materials in this document include coating materials that are cured by UV, electron beam, and other radiation methods.

If the system of the first case contains SVOC, the VOC result may be influenced by SVOC, see Annex D. In this case ISO 11890-2 shall be preferred. ISO 11890-1 cannot be used for the determination of the SVOC content. In water-borne coating materials, if the water content is much greater than VOC content and VOC content is less than a mass fraction of 10 %, ISO 11890-2 shall be preferred.

In the third case, the main purpose measured is VOC. However, it needs to be clarified that this VOC content can also contain SVOC. The real VOC content may be lower than the VOC content measured by ISO 11890-1.

This method assumes that the volatile matter is either water or organic. However, other volatile inorganic compounds can be present and might need to be quantified by another suitable method and allowed for in the calculations. The method defined in this document is not applicable for determination of water content.