Rotating disk electrode method and apparatus for multi-elemental determination of concentration of particles in used oil
US5408306A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 16, 1994 |
| Grant date | Apr 18, 1995 |
| Priority date | — |
| Expiry date | Feb 16, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/25375
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Spectrometric analysis for determining the elemental concentration of various wear metals, contaminants and additives present in a fluid sample for condition monitoring and preventive maintenance. RDE spectroscopy method and apparatus includes use of rotrode disk as a filter which captures large particles of the surface of the disk, which particles are then subjected to RDE spectroscopy for evaluation. In one method, the rotrode with the captured large-particle filtrate is subjected to a solvent wash, and the washed sample is then submitted to RDE spectroscopy to obtain a highly accurate multi-elemental determination of concentration of large particles. In another method, conventional RDE spectroscopy is used to characterize the small particles in a used oil sample, and this is combined with the obtained large particle data for highly accurate multi-elemental determination of concentration of wear debris, contaminants and additives in the fluid sample.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.