1. Scope
1.1 This test method covers the determination of salt in crude oils. For the purpose of this test method, salt is expressed as % (m/m) NaCl (sodium chloride) and covers the range from 0.0005 to 0.15 % (m/m).
1.2 The limit of detection is 0.0002 % (m/m) for salt (as NaCl).
1.3 The test method is applicable to nearly all of the heavier petroleum products, such as crude oils, residues, and fuel oils. It may also be applied to used turbine oil and marine diesel fuel to estimate seawater contamination. Water extractable salts, originating from additives present in oils, are codetermined.
1.4 The values stated in SI units are to be regarded as the standard.
1.5 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
D 329 Specification for Acetone
D 770 Specification for Isopropyl Alcohol
D 843 Specification for Nitration Grade Xylene
D 1193 Specification for Reagent Water
D 4006 Test Method for Water in Crude Oil by Distillation
D 4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D 4177 Practice for Automatic Sampling of Petroleum and Petroleum Products
D 4377 Test Method for Water in Crude Oils by Potentiometric Karl Fischer Titration
D 4928 Test Method for Water in Crude Oils by Coulometric Karl Fischer Titration
E 200 Practice for Preparation, Standardization, and Storage of Standard and Reagent Solutions for Chemical Analysis
