BS EN ISO 11890-2:2020,Paints and varnishes – Determination of volatile organic compounds (VOC) and/or semi volatile organic compounds (SVOC) content.
BS EN ISO 11890-2:2020 is one of a series of standards dealing with the sampling and testing of coating materials and their raw materials. It specifies a method for the determination of the volatile organic compounds (VOC) content and the semi-volatile organic compounds (SVOC) content of coating materials and their raw materials.
BS EN ISO 11890-2:2020 is applicable for the determination of VOC and SVOC with an expected VOC and/or SVOC content greater than 0,01 % by mass up to 100 % by mass.
BS EN ISO 11890-2:2020 given in ISO 11890-1 is used when the VOC is greater than 15 % by mass. This document (method ISO 11890-2) applies when the system contains VOC and SVOC as the VOC result of ISO 11890-1 can be influenced by the SVOC. For VOC content smaller than 0,1 %, the head space method described in ISO 17895 is used as an alternative. ISO 11890-1 and ISO 17895 cannot be used for the determination of the SVOC content.
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.
4 Principle
After preparation of the sample, the VOCs, SVOCs and NVOCs are separated by a gas chromatographic technique. Either a hot or a cold sample injection system is used, depending on the sample type Hot injection is the preferred method. After the compounds have been identified, e.g. via GC-MS, they are quantified from the peak areas with respect to their compound specific relative response with the help of an internal standard, via GC-PID.Non-identifiable substances are quantified with respect to a surrogate standard that can be identical to the internal standard. A calculation is performed to give the VOC and/or SVOC content of the sample.
5 Required information
For any particular application, the information required should preferably be agreed between the interested parties and may be derived, in part or totally, from an international or national standard or other document related to the product under test.