Standard Test Method for Acidity in Ethanol and Ethanol Blends by Titration

Importancia y uso:

5.1 This test method measures acidity in ethanol or ethanol blends quantitatively. Denatured fuel ethanol may contain additives such as corrosion inhibitors and detergents as well as contaminants from manufacturing that can affect the acidity of finished ethanol fuel. Very dilute aqueous solutions of low molecular mass organic acids, such as acetic acid, are highly corrosive to many metals. It is important to keep such acids at a very low level.

5.2 Acceptable levels of acidity in ethanol or ethanol blends can vary with different specifications but in general it is below 200 mg/kg (ppm). Knowledge of the acidity can be required to establish whether the product quality meets specification.

Subcomité:

D02.06

Referida por:

D1613-17R23, E3050-24, D5798-21, D4806-21A, D4806-21A, D1240-24, E3237-24, D1613-17R23, E3334-24, D1613-17R23, D4806-21A

Volúmen:

05.04

Número ICS:

75.160.20 (Liquid fuels)

Palabras clave:

acidity; denatured fuel ethanol; E30, E60 acetic acid; E95; ethanol; ethanol blends; potentiometric; titration;