| Fuel Quality Test Concepts |
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| Extraction of
catalyst or acid from fuel to |
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| aqueous pH
indicator elicits color change |
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| Soluble
contaminants in biodiesel can be: |
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| >Extracted into the aqueous phase |
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| (fatty acid soaps) as visible turbidity |
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| >Concentrated
at water-fuel interface |
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(glycerides & fats, oxidized esters) |
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“Lens Effect” signal amplification |
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| >Hydrated in the fuel as visible
turbidity |
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(mono, di & triglycerides; fatty acids) |
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| © CytoCulture |
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