Fuel Ethanol
The American Society for Testing and Materials (A.S.T.M.) have established a standard D4806-98 for "Denatured fuel ethanol for blending with gasoline, for use as automotive spark-ignition engine fuel", which is generally accepted throughout the industry. For full details and test procedures, reference should be made to the standard, which is available from A.S.T.M.
| 1. | Ethanol, %v/v: | 92.1 min. | |
| 2. | Methanol, %v/v: | 0.5 max. (5,000 ppm) | |
| 3. | Water, % v/v: |
1.0 max. (10,000
ppm)
|
|
| 4 | Solvent-washed gum, mg/100ml: |
5 max. (50
ppm)
|
|
| 5. | Chloride ion, mg/L: |
40 max. (40
ppm)
|
|
| 6. | Copper content, mg/kg: |
0.1 max. (0.1
ppm)
|
|
| 7. | Acidity, as acetic acid, %w/w: * |
0.007 max.
(70 ppm)
|
|
| 8. | Appearance: | Visibly free of suspended or precipitated contaminants (clear and bright). | |
| 9. | Denaturant: |
A minimum of
1.96% v/v, and a maximum of 4.76% v/v of natural gasoline, gasoline components
or unleaded gasoline.
|
|
* Note: There was an error in the original standard. It stated "mass % (mg/Litre)" which are not the same units, whereas the relevant analytical method specifies "%w/w."