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Evaluation of a Detector for Free Water in Fuel.

AD481506

Publication Date	1966
Personal Author	Johnston, R. K.; Monita, C. M.
Page Count	51
Abstract	A test apparatus and procedure for detecting small amounts of free water in jet fuels have been evaluated. A fuel sample is passed through a dye-coated pad, which is then rated for fluorescence under ultraviolet illumination in comparison with color standards. Based on static evaluation of standard samples, the detector has accuracy and precision well within 5 mg/liter on samples containing up to 20 mg/liter free water. The detector often indicates traces of free water in filter-separator effluent samples for which Karl Fischer analyses indicate undersaturated fuel, which is explained by the nonequilibrated state of such samples. Normal concentrations of anti-icing additive, corrosion inhibitor, or iron oxide contaminant do not affect the sensitivity of the detector, based on limited data. The detector is far simpler and faster than the Karl Fischer method and is believed to give more meaningful results. It appears to be very suitable for use in preproduction tests of filter-separators and elements. The usefulness of the detector in base fuel quality control will depend somewhat on availability of suitable prepackaged pad holders and viewing comparators. Direct line sampling through a detector pad is more reliable than the use of bottled samples. Field trials and further laboratory evaluations are recommended. (Author)
Keywords	Fuel contamination Water Jet engine fuels Detection Detectors Test equipment Fuel additives Test methods Sensitivity Ultraviolet radiation Fluorescence Liquid filters Separation Measurement Particles Petroleum products Acceptability
Source Agency	Non Paid Delimited ADS
NTIS Subject Category	97K - Fuels
Corporate Authors	Southwest Research Inst San Antonio Tex
Document Type	Technical Report
Title Note	Summary rept. Mar 65-Mar 66.
NTIS Issue Number	197714
Contract Number	AF 33(615)-2327

Evaluation of a Detector for Free Water in Fuel.

Evaluation of a Detector for Free Water in Fuel.
AD481506

Publication Date	1966
Personal Author	Johnston, R. K.; Monita, C. M.
Page Count	51
Abstract	A test apparatus and procedure for detecting small amounts of free water in jet fuels have been evaluated. A fuel sample is passed through a dye-coated pad, which is then rated for fluorescence under ultraviolet illumination in comparison with color standards. Based on static evaluation of standard samples, the detector has accuracy and precision well within 5 mg/liter on samples containing up to 20 mg/liter free water. The detector often indicates traces of free water in filter-separator effluent samples for which Karl Fischer analyses indicate undersaturated fuel, which is explained by the nonequilibrated state of such samples. Normal concentrations of anti-icing additive, corrosion inhibitor, or iron oxide contaminant do not affect the sensitivity of the detector, based on limited data. The detector is far simpler and faster than the Karl Fischer method and is believed to give more meaningful results. It appears to be very suitable for use in preproduction tests of filter-separators and elements. The usefulness of the detector in base fuel quality control will depend somewhat on availability of suitable prepackaged pad holders and viewing comparators. Direct line sampling through a detector pad is more reliable than the use of bottled samples. Field trials and further laboratory evaluations are recommended. (Author)
Keywords	Fuel contamination Water Jet engine fuels Detection Detectors Test equipment Fuel additives Test methods Sensitivity Ultraviolet radiation Fluorescence Liquid filters Separation Measurement Particles Petroleum products Acceptability
Source Agency	Non Paid Delimited ADS
NTIS Subject Category	97K - Fuels
Corporate Authors	Southwest Research Inst San Antonio Tex
Document Type	Technical Report
Title Note	Summary rept. Mar 65-Mar 66.
NTIS Issue Number	197714
Contract Number	AF 33(615)-2327