Analysis of wear metals in perfluorinated fluids

Details Analysis of wear metals in perfluorinated fluids Analysis of wear metals in perfluorinated fluids

1995-02-21

1996-04-09

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

With sample excitation

356243, G01N 2171, G01J 102

Patent

active

055066771

ABSTRACT:
Soluble metal complexes for use as standards in wear metal analysis of PFPAE fluids are provided. These standards are the metal complexes of 2,2-dimethyl-6,6,7,7,8,8,8,-heptafluoro-3,5-octanedione (HFOD). These complexes are soluble in PFPAE's to at least 100 ppm metal and are stable over a long period of time (months) in the presence of air. Generally, the metals of interest are Al, Na, Mg, Ca, Ba, Ni, Cu, Zn, Cd, Pb, Hg, Fe, Cr, Mn, V, Mo, Si, Ag, Na, Sn, Ti and Co. Also provided is a method for determining the concentration of at least one wear metal in a PFPAE fluid. This method is particularly suitable for determining determining the concentration of at least one wear metal in a PFPAE fluid by inductively coupled plasma-atomic emission spectroscopy.

REFERENCES:
patent: 5383019 (1995-01-01), Farrell et al.
C. S. Springer, Jr., D. W. Meek, and R. E. Sievers, "Rare Earch Chelates of 1,1,1,2,2,3,3,-Heptafluoro-7,7-dimethyl-4,6-octanedione", Inorganic Chemistry, vol. 6, No. 6, Jun. 1967, pp. 1105-1110.

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