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Significance and Use
A knowledge of the water content of crude oil is important in the refining, purchase, sale, or transfer of crude oils.
1.1 This test method covers the determination of water in the range from 0.02 to 2 % in crude oils. Mercaptan and sulfide (S− or H2S) sulfur are known to interfere with this test method (see Section 5).
1.2 This test method is intended for use with standard Karl Fischer reagent or pyridine-free Karl Fischer reagents.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 This standard does not purport to address all of the safety concerns, 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. Specific precautionary statements are given in Section 7.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D1193 Specification for Reagent Water
D4006 Test Method for Water in Crude Oil by Distillation
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products
E203 Test Method for Water Using Volumetric Karl Fischer Titration
API StandardsMPMSChapter10.2 Determination of Water in Crude Oil by Distillation (ASTM Test Method )
ICS Number Code 75.040 (Crude petroleum)
UNSPSC Code 15101508(Crude oil)
ASTM D4377-00(2011), Standard Test Method for Water in Crude Oils by Potentiometric Karl Fischer Titration, ASTM International, West Conshohocken, PA, 2011, www.astm.orgBack to Top