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Hopane

A class of pentacyclic triterpane biomarker compounds (C27-C35) in petroleum, derived from bacteriohopanetetrol in ancient sedimentary organic matter. C30 17alpha,21beta-hopane is the most weathering-resistant compound in most crude oils and is used as the internal normalisation standard in oil-spill source attribution.

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AroclorC30 17alpha-hopaneDissolved gas analysis (DGA)GC-IRMSGC×GC-TOFMSKarl Fischer titration (KFT)SAE viscosity gradeUnresolved complex mixture (UCM)Zinc dialkyldithiophosphate (ZDTP)

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