ASTM International - ASTM UOP481-91

Water in Liquid Hydrocarbons by Coulometry

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Organization: ASTM International
Publication Date: 29 July 2002
Status: historical
Page Count: 9
scope:

This coulometric method is for determining water dissolved in liquid hydrocarbons, including sulfolane and the Carom process solvent. The method is generally applicable to traces of water, but can also be applied to mass-% levels. The lower limit of quantitation is 3 mass-ppm, but values below 10 mass-ppm are considered semi-quantitative. Common interferences include: aldehydes, ketones and mercaptans (see NOTE). ASTM D 1364, a volumetric Karl Fischer method, is generally used for samples containing greater than 7 mass-% water.

Since accurate measurement of water content in liquid hydrocarbons is primarily dependent on the ability to obtain and keep representative samples, the on-line technique described in UOP Method 344 is recommended, when applicable.

Document History

March 1, 2010
Water in Liquid Hydrocarbons, and Heavy Hydrocarbons by Vaporizer, using Coulometry
This method is for determining the water content of liquid hydrocarbons (naphtha, gasoline, kerosene, diesel), or other petroleum products (sulfolane and other solvents) that are liquid at room...
April 1, 2009
Water in Liquid Hydrocarbons and Heavy Hydrocarbons by Vaporizer, using Coulometric Titration
This method is for determining the water content of liquid hydrocarbons (naphtha, gasoline, kerosene, diesel), or other petroleum products (sulfolane and other solvents) that are liquid at room...
ASTM UOP481-91
July 29, 2002
Water in Liquid Hydrocarbons by Coulometry
This coulometric method is for determining water dissolved in liquid hydrocarbons, including sulfolane and the Carom process solvent. The method is generally applicable to traces of water, but can...
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