Method for the particle size independent spectrometric determina

Details Method for the particle size independent spectrometric determina Method for the particle size independent spectrometric determina

1982-09-30

1984-05-15

Turk, Arnold

Chemistry: analytical and immunological testing

Lubricant, grease, mineral oil, hydrocarbon oil product, or...

73 64, 356 70, 436 73, 436175, G01N 2171, G01N 3320, G01N 3328

Patent

active

044488874

ABSTRACT:
The degree of wear metal contamination in an oil is determined by treating a sample of the oil with a mixture of HF/HCl
itric acid, diluting the oil/acid mixture with a solvent mixture consisting of a nonionic surfactant and a diluent, and spectrometrically analyzing the resulting diluted mixture. Severe wear in an oil wetted apparatus may be detected by directly analyzing spectrometrically a sample of the oil and comparing the results of such analysis with the results obtained according to the acid dissolution method described above.

REFERENCES:
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patent: 3942360 (1976-03-01), Wada
patent: 3981584 (1976-09-01), Guymer
patent: 4176545 (1979-12-01), Oddo
patent: 4324758 (1982-04-01), Eisentraut et al.
W. W. Seifert et al., "A Method for the Study of Wear Particles in Lubricating Oils", Wear 1972, 21, 27-42.
V. C. Westcoff et al., "Investigation of Iron Content of Lubricating Oil Using a Ferrograph & an Emission Spectrometer", Wear 1973, 23, 239-249.
J. R. Brown et al., "Particle Size Independent Spectrometric Determination of Wear Metals in Aircraft Lubricating Oils", Analytical Chemistry, 1980, 52, 2365-2370.
C. S. Saba et al., "Efficiencies of Sample Introduction Systems for the Transport of Metallic Particles in Plasma Emission & Atomic Absorption Spectrometry", Analytical Chemistry 1981, 53, 1099-1103.
R. E. Kauffman et al., "Quantitative Multielement Determination of Metallic Wear Species in Lubricating Oils and Hydraulic Fluids", Analytical Chemistry 1982, 54, 975-979.

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