Standard Test Method for Chloride in Mono-, Di- and Tri-ethylene Glycol by Ion Chromatography

Importancia y uso:

4.1 This test method provides for the quantitative determination of inorganic chloride (chloride ion) in monoethylene glycol (MEG), diethylene glycol (DEG) and triethylene glycol (TEG) using ion chromatography with conductivity detection. The analysis time is less than 5 min with little or no sample preparation required. Conductivity detection is a universal detection mode and is linear over the range of the method. Acceptable levels of chloride in polyester-grade and low-conductivity-grade MEG vary with the manufacturer’s specifications but are normally in the low mg/kg range. Knowledge of the chloride content in polyester-grade and low-conductivity-grade MEG is required to establish whether the MEG product meets specification requirements.

4.2 Glycols have high viscosities and a dilution with high quality deionized water may be required depending on the capability of the autosampler, if used, to deliver the injection. All standards and samples, whether diluted or not should be treated in the same manner.

Subcomité:

D16.14

Referida por:

E2470-22

Volúmen:

06.04

Número ICS:

71.040.40 (Chemical analysis)

Palabras clave:

chloride; DEG; diethylene glycol; IC; ion chromatography; MEG; monoethylene glycol; TEG; triethylene glycol;