Study on Raman Spectroscopy Detection Method of Furfural in Transformer Oil Based on Microfluidic Chip

The content of dissolved furfural in oil is an important feature to determine the aging status of transformer insulation. Microfluidic chips are experimental devices that integrate chemical and biological analytical processes, including the synthesis, reaction, separation and detection onto one single microchip and complete the analysis. Moreover, Raman spectrum detection method of furfural in transformer oil based on microfluidic chip has very high sensitivity that could be easily used for monitoring environmental pollutants and biological analysis of samples. In this paper, a microfluidic chip has been designed. The intensity variation of the Raman characteristic peak of furfural reflects the concentration variation of furfural in oil. A direct measurement method of furfural Raman spectroscopy in oil based on microfluidic was established. The microfluidic Raman detection was carried out with deionized water as the dispersed phase, and the lowest concentration of furfural detected was 1.38 mg/L. It could be proved that the feasibility of microfluidic technology for in-situ detection of furfural Raman spectroscopy in oil, which laid the foundation for subsequent research.