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Aroclor

A series of polychlorinated biphenyl (PCB) commercial mixtures manufactured by Monsanto (US) and marketed as electrical insulating fluids. Aroclors are designated by four digits (e.g. Aroclor 1254, 54% chlorine by mass). Their congener-specific GC chromatographic patterns are used to identify the PCB source in contaminated transformer oil.

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C30 17alpha-hopaneDissolved gas analysis (DGA)GC-IRMSGC×GC-TOFMSHopaneKarl Fischer titration (KFT)SAE viscosity gradeUnresolved complex mixture (UCM)Zinc dialkyldithiophosphate (ZDTP)

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