Abstract：Furfural content in transformer oil can evaluate the aging condition of transformer insulating paper and reflect its insulation performance. Through the quantitative analysis of furfural content in transformer oil by high performance liquid chromatography, the mathematical model was established. It was determined that the uncertainty sources of the determination results are furfural reference material, preparation of standard oil, fitting of standard curve, sample preparation, recovery and measurement repeatability, and the uncertainty of the test results was evaluated. The experimental results showed that the concentration of furfural in the electric insulating oil is 1.05mg/kg, and its extended uncertainty U95=0.03mg/kg, the fitting of standard curve is the main source of uncertainty in the determination of furfural by HPLC.
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2022, Vol. 43 
