What is the process for PCB determination in transformer oil?

The process for PCB determination in transformer oil involves sampling the oil and analyzing it using gas chromatography-mass spectrometry (GC-MS) or similar techniques. The oil sample is extracted and prepared to isolate polychlorinated biphenyls (PCBs). The concentration of PCBs is then quantified, allowing for assessment of contamination levels. This process is crucial for ensuring compliance with environmental regulations and assessing the safety of transformer oil in power transformers.