Detection of furfurol content in transformer oil is an effective method to judge the aging degree of insulated paper in the transformer.Comparing the liquid-phase chromatographic method with the spectrophotometric method used for detecting furfurol content in transformer oil

it is believed that the former has advantages of high accuracy and reproducibility.Through test

the detection conditions for liquid-phase chromatographic method have been obtained as follows:the detection wavelength being 265 μm or 270 μm;the mobile phase being selected as mixture of methanol and water

the volume ratio between them being 1:1;the detection flow rate being 0.8 mL/min;the extractant selecting as methanol

5 mL test oil having been extracted by using 5 mL methanol

extraction time 1~2 min.By using the liquid-phase chromatographic method

the furfurol content in transformer oil of 235 transformers with different operation years and voltage grades in Jiangxi Province has been detected

discovering that the longer operation year of transformers the large furfurol content in transformer oil

conforming to the regularity of practical operation.