ASTM D1744 method for determination of water in liquid petroleum products
ASTM D1744 standard test method for determination of water in liquid petroleum products by Karl Fischer reagent
1. Scope
1.1 This test method covers the determination of water in the concentration from 50 to 1000 mg/kg in liquid petroleum products.
1.2 Values stated in SI units are to be regarded as the standard. Inch-pound units are provided for information only.
1.3 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements see Section 7.
2. Referenced Documents
2.1 ASTM Standards:
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
3. Summary of Test Method
3.1 The material to be analyzed is titrated with standard Karl Fischer reagent to an electrometric end point.
4. Significance and Use
4.1 Knowledge of the water content of petroleum products can be useful to predict quality and performance characteristics of the product.
5. Interferences
5.1 Free alkali, oxidizing and reducing agents, mercaptans, certain basic nitrogenous substances, or other materials that react with iodine, interfere. One part per million of sulfur as mercaptan causes an error in the titration, equivalent to approximately 0.2 mg/kg of water.
