Preparation of Reference Materials for Analysis of Dissolved Gas in Power Transformer Oil

The reference material for analysis of dissolved gas in power transformer oil were developed by weighing method. The uniformity and stability of the reference material were examined by F test and regression curve method, respectively. The results showed that the uniformity and stability of the reference materials were good. The certified value of the reference materials was 5 000μmol/mol with relative expanded uncertainty of 1%(k=2). The reference material can be used for the analysis and testing of dissolved gas in power sector transformer oil.