Testing Services: Denatured Fuel Ethanol

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Method	Test	Test Details	Volume	Price ($US)
D 381	Solvent-washed Gum Content	D 381 / Solvent-washed Gum Content The D381 Washed and Unwashed Gum Content measures the amount of gum residues present in the fuel. Gums are varnish-like oxidation products that can cause sticking and plugging of moving fuel components. This test is most appropriate for gasoline, ethanol, gasoline blends, and aviation fuels. The D6217 and D7321 methods are better suited for diesel, biodiesel, and diesel blends.	75 mL	$46.00
D 1688	Copper	D 1688 / Copper The D1688 Copper method determines the amount of copper in aqueous solutions. Copper is a very active catalyst for hydrocarbon oxidation and can contribute to gum formation in gasoline and gasoline blends. This method is typically used for denatured fuel ethanol and E85 blends.	50 mL	$38.00
D 5453	Sulfur	D 5453 / Sulfur The D5453 Sulfur method measures the total sulfur content by UV fluorescence. This test is suitable for most liquid hydrocarbons and some solids (i.e. fats and feedstock materials) if they can be dissolved in toluene. This method is not suitable for glycerin.	20 mL	$51.00
D 5501	Ethanol/Methanol Content (E21 & higher blends)	D 5501 / Ethanol/Methanol Content (E21 & higher blends) The D5501 Ethanol Content method measures the ethanol and methanol content of denatured fuel ethanol and higher ethanol blends (E21 to E85). For ethanol contents below 20 % (E0 to E20), the D4815 method is more appropriate.	15 mL	$105.00
D 6423	pHe	D 6423 / pHe The D6423 pHe method measures the hydrogen ion activity (pH) of ethanol fuels. The pHe value is a good indication of the corrosion potential of the fuel. This method is not suitable for hydrocarbon oils such as diesel and biodiesel.	75 mL	$33.00
D 7319	Inorganic Chloride/Existent Sulfate	D 7319 / Inorganic Chloride/Existent Sulfate The D7319 Inorganic Chloride/Existent Sulfate method measures chlorides and sulfates in denatured fuel ethanol and E85 blends. Excess chlorides and sulfates can contribute to the formation of filter and injector plugging deposits.	20 mL	$61.00
D 7795	Acidity (as acetic acid)	D 7795 / Acidity (as acetic acid) The D7795 Acidity in Ethanol method gives a quantitative measure of acidic compounds in ethanol and ethanol blends and expresses the result as acetic acid. Even very low concentrations of organic acids such as acetic acid can be very corrosive to fuel components and so it is important to assure that these acids are in very low levels.	75 mL	$46.00
E 203	KF Moisture (Volumetric)	E 203 / KF Moisture (Volumetric) The E203 Volumetric KF Moisture method measures the level of moisture entrained in a fuel sample by Karl Fischer titration. This test is very sensitive and can detect water in the low ppm (parts per million) range. This method is suitable for any fuel sample but is more commonly used for samples with ethanol content, or for samples expected to contain higher concentrations of water.	5 mL	$42.00

*Our goal is to provide results for standard samples within 72 hours of receipt of sample, and RUSH service within 24 hours for most tests. Turnaround time goals reflect normal business hours of 8am-4pm Monday through Friday, excluding weekends and observed holidays. RUSH service is available at 2X normal price. For RUSH service, please contact us ahead of time to reduce any delays.

**Prices are valid December 31, 2024 - February 28, 2025

***Testing prices performed by an outsource laboratory are subject to change without notice.