ASTM D96 Water and Sediment in Crude Oil by Centrifuge Method (Field Procedure)
1. Scope
1.1 This test method covers the centrifuge method for determining sediment and water in crude oil during field custody transfers. This test method may not always provide the most accurate results, but it is considered the most practical method for field determination of sediment and water. When a higher degree of accuracy is required, the laboratory procedure described in Test Methods D4006, D4377 or D473 should be used.

NOTE 1 - Water by distillation and sediment by extraction are considered the most accurate methods of determining sediment and water in crude oils. As such, these methods should be employed to resolve differences in results from variations of this procedure or between this procedure and other methods, or in the case of a dispute between parties.

1.2 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.

2. Referenced Documents
2.1 ASTM Standards:
D235 Specification for Mineral Spirits (Petroleum Spirits) (Hydrocarbon Drycleaning Spirits)
D362 Specification for Industrial Grade Toluene
D473 Test Method for Sediment in Crude Oils and Fuel Oils by the Extraction Method
D846 Specification for Ten-Degree Xylene
D1209 Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)
D3699 Specification for Kerosine
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
D4377 Test Method for Water in Crude Oils by Potentiometric Karl Fischer Titration
E 1 Specification for ASTM Thermometers
E 542 Practice for Calibration of Volumetric Ware

2.2 API Standards:
Manual of Petroleum Measurement Standards
Chapter 8, Sampling Petroleum and Petroleum Products
Chapter 10, Sediment and Water