Analysis of 1, 2, 3-Benzotriazole in Electrical Insulating Oil with Prominence-i

When abnormal heating or insulation degradation occurs inside oil-filled equipment, gas produced by decomposition of the insulating oil and products of insulator deterioration will mix with the insulating oil and change its chemical properties. Quantitation of 1, 2, 3-benzotriazole is used as a method for testing the performance of insulating oil. 1, 2, 3-benzotriazole is often added to electrical insulating oil to suppress streaming electrification during cooling, and prevent sulfidation corrosion. It is also known to improve thermal stability and electrical properties. An example analysis of 1, 2, 3-benzotriazole in electrical insulating oil is described here using the new Prominence-i integrated high performance liquid chromatograph.