Abstract
We developed a laser Raman spectroscopy technique for the in-situ detection and identification of leaked
oils around a transformer to determine whether the leakage originated from its container or an ancillary
pipe. This technique successfully identified oil samples using the spectral differences observed in the
1000-3500 cm-1 spectral region. We also demonstrated the Raman identification of oils floating on the
water surface as well as oils that were extracted from soils using water. Our results show that laser
Raman spectroscopy is a useful method for the in-situ determination of oil leaking from transformers
