Standard Test Method for Acidity in Mono-, Di-, Tri- and Tetraethylene Glycol by Non-Aqueous Potentiometric Titration

Importancia y uso:

5.1 This test method provides for the quantitative determination of total acidity in ethylene glycols by non-aqueous potentiometric titration. The run time for titration of ethylene glycol samples ranges from 5 to 10 min with no sample preparation required. The length of time for a titration depends on the amount of acidity in the sample and the acidity generally increases from monoethylene glycol to the higher glycols like tetraethylene glycol.

5.2 Acceptable levels of acidity in ethylene glycols vary with the manufacturer’s specifications but are normally below 200 mg/kg. Knowledge of the acidity in ethylene glycols is required to establish whether the product quality meets specification requirements.

Subcomité:

D16.14

Referida por:

E1119-23, E2470-22, E0202-24

Volúmen:

06.04

Número ICS:

71.080.60 (Alcohols. Ethers)

Palabras clave:

acetic acid; acidity; diethylene glycol; monoethylene glycol; non-aqueous titration; potentiometric; tetraethylene glycol; titration; triethylene glycol;