STEP 4 : : infrared spectrometryThe purpose of infrared spectrometry is to identify the molecular links in a sample. The infrared spectrum could be described as its "fingerprints".
Theoretical basis
The reading of a spectrum will tell us about:
- the quality of the oil tested
- any degradation in the qualities of the oil
- its contamination by foreign bodies
Application to used oil analyses
The main parameters which can be measured by infrared are:
- carbon number in %
- water content in %
- glycol content in %
- fuel content in %
- oxidation number (reaction with oxygen)
- nitration number (reaction with nitrogen)
- sulphation number (reaction with sulphur).
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