Work Item
ASTM WK86367

Revision of D4928-12(2018) Standard Test Method for Water in Crude Oils by Coulometric Karl Fischer Titration

Rationale

NOTE: The only thing being balloted is the yellow highlighted wording within the standard; which is solely the Evaporative Method that was incorporated into the existing Ch. 10.9 standard.

By evaporating the water into the Karl Fischer titration cell, a much cleaner material than crude oil is actually titrated, minimizing matrix effects and allowing for many more samples to be analyzed before cell cleaning is necessary. Auto-injection of up to 50 samples tested consecutively improve the efficiency of the overall process. Sample preparation, analysis and data transfer can be achieved in about ten minutes for a typical crude oil. The method allows the sample to be collected at the point of interest and be analyzed without subsequent re-homogenization, thus eliminating such re-homogenization risk(s).The proposed action is to incorporate pre-evaporation method into the existing API 10.9 (ASTM 4928) methods for KF Titration, as well as, change the existing Scope as applicable for including the evaporative method.

Details

Developed by Subcommittee: D02.02

Committee: D02

Staff Manager: Alyson Fick

Work Item Status

Date Initiated: 05-11-2023

Technical Contact: Paul Genre

Item: 000

Ballot:

Status: