Liquid ionization mass spectrometry of organometallic compounds used as lubricating oil additives

Journal Article · Tue Apr 01 04:00:00 EST 1986 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00295a008· OSTI ID:5955241

Tsuchiya, M; Kuwabara, H; Musha, K

Liquid ionization mass spectrometry, a method of soft ionization at atmospheric pressure, was applied to analyze organometallic compounds used as lubricating oil additives. Alkanes such as undecane (matrix) and chloroform (solvent) were found to be better than others examined. Since proton affinities of organometallic compounds are generally larger than those of lubricating oils, zinc complexes are selectively ionized, resulting in dominant MH/sup +/ ions whose isotope peak ratios agree well with their natural abundances. Furthermore, the relative intensities of MH/sup +/ peaks coincide with the composition of a mixture of zinc complexes. Since each compound has an optimum temperature for producing MH/sup +/ ions, selective desorption of ions for each component in a mixture is also possible by increasing the sample heater current. As an example, detection of lubricating oil additives in a commercial engine oil is described. 21 references, 10 figures, 1 table.

• Research Organization: Univ. of Tokyo, Japan
• OSTI ID: 5955241
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 58:4; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
023000 -- Petroleum-- Properties & Composition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104* -- Spectral Procedures-- (-1987)
ADDITIVES
ALKANES
CHARGED PARTICLES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHLORINATED ALIPHATIC HYDROCARBONS
CHLOROFORM
DATA
EXPERIMENTAL DATA
FLUIDS
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROCARBONS
INFORMATION
IONIZATION
IONS
LIQUIDS
LUBRICANTS
LUBRICATING OILS
MASS SPECTROSCOPY
NUMERICAL DATA
OILS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANOMETALLIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
QUANTITATIVE CHEMICAL ANALYSIS
SPECTROSCOPY