Lake Superior State University
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Jason, from the US Fish and Wildlife Service, fights the Sea Lamprey in Michigan waters. Video from Fox 17

Jason Krebill '00
Fisheries & Wildlife Management

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Measure- ment of CI/LI Additive in Military Jet Fuel by Infrared Spectro- metry

Christine Larkin

The overall objective of this project was to evaluate the feasibility of utilizing infrared spectrometry to measure Corrosion Inhibitor/Lubricity Improver (CI/LI) additive in military fuels. Four methodologies were evaluated, but only one methodology was found to be somewhat effective. The Direct Sample, Direct Sample with Standard Addition, and Concentrated Sample methodologies were ineffective. The Concentrated Sample with Standard Addition methodology was effective at correlating concentration and transmittance or absorbance within a single additive brand, but the correlation was not universally applicable across all CI/LI additive brands. It was also found that the absorbance variance of blank fuel samples completely encompassed the measurements of fuel with additives in them. This indicates that the instrument would be unable to accurately assess the concentration of CI/LI additive in a fuel sample of unknown CI/LI concentration. For this technology to be feasible, a different calibration curve would be needed for each commercial additive brand that the Army uses and it would only be capable of measuring additive concentrations as additive is being added to fuel or for the verification of additive injection equipment.

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