1. Scope

1.1 These test methods cover the determination of organic chloride (above 1 g/g organically-bound chlorine) in crude oils, using either distillation and sodium biphenyl reduction or distillation and microcoulometry.

1.2 These test methods involve the distillation of crude oil test specimens to obtain a naphtha fraction prior to chloride determination. The chloride content of the naphtha fraction of the whole crude oil can thereby be obtained. See Section regarding potential interferences.

1.3 Test Method A covers the determination of organic chloride in the washed naphtha fraction of crude oil by sodium biphenyl reduction followed by potentiometric titration.

1.4 Test Method B covers the determination of organic chloride in the washed naphtha fraction of crude oil by oxidative combustion followed by microcoulometric titration.

1.5 Values expressed in acceptable SI units are to regarded as the standard. The preferred concentration units are micrograms of chloride per gram of sample.

1.6 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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D86 Test Method for Distillation of Petroleum Products at Atmospheric Pressure

D1193 Specification for Reagent Water

D4057 Practice for Manual Sampling of Petroleum and Petroleum Products

D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products

D6299 Practice for Applying Statistical Quality Assurance and Control Charting Techniques to Evaluate Analytical Measurement System Performance

Keywords

coulometry; crude oil; organic chloride; organo-chlorine; sodium biphenyl; Crude petroleum products; Distillate fuels; Distillation petroleum products; Organic chloride; Organo-chlorine; Oxidative combustion; Potentiometric method; Sodium biphenyl reduction; Titration; Washed naphtha fractions; Accreditation practice; Chloride analysis petroleum products; Combustion petroleum products; Coulometry microcoulometry;

ICS Code

ICS Number Code 75.040 (Crude petroleum)

DOI: 10.1520/D4929-04

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