The identification of zinc dialkyldithiophosphates in lubricating oils by electrospray ionization mass spectrometry
- Texaco R & D, Beacon, NY (United States)
Electrospray Ionization Mass Spectrometry (ESI) was used to characterize the Zinc Dialkyldithiophosphates (ZDDPs), which are usually found in finished commercial motor oils. ZDDPs are detergent-like molecules consisting of the polar heteroatomic organometalic core surrounded with highly alkylated side-chains to increase their solubility in the base oil. The core contains a central zinc atom coordinated to two dithiophosphate esters. Generally two alkylated side chains, ranging from three to thirteen carbons, will be on each ester. ZDDPs are low cost additives which form protective films to reduce engine wear and prevent metal seizures. ZDDPs also serve as oxidation inhibitors. Their concentrations typically vary between 1% and 4%.
- OSTI ID:
- 210706
- Report Number(s):
- CONF-9505261-; TRN: 96:001157-0145
- Resource Relation:
- Conference: 43. American Society of Mass Spectrometry (ASMS) conference on mass spectrometry and allied topics, Atlanta, GA (United States), 21-26 May 1995; Other Information: PBD: 1995; Related Information: Is Part Of Proceedings of the 43rd ASMS conference on mass spectrometry and allied topics; PB: 1411 p.
- Country of Publication:
- United States
- Language:
- English
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