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Significance and Use
Sulfur present as mercaptans or as hydrogen sulfide in distillate fuels and solvents can attack many metallic and non-metallic materials in fuel and other distribution systems. A negative result in the doctor test ensures that the concentration of these compounds is insufficient to cause such problems in normal use.
1.1 This test method covers and is intended primarily for the detection of mercaptans in motor fuel, kerosine, and similar petroleum products. This method may also provide information on hydrogen sulfide and elemental sulfur that may be present in these sample types.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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.
D1193 Specification for Reagent Water
D3227 Test Method for (Thiol Mercaptan) Sulfur in Gasoline, Kerosine, Aviation Turbine, and Distillate Fuels (Potentiometric Method)
Energy Institute StandardsIP 30 Detection of Mercaptans, Hydrogen Sulfide, Elemental Sulfur, and Peroxides Doctor Test Method
ICS Number Code 75.080 (Petroleum products in general); 75.160.20 (Liquid fuels)
UNSPSC Code 15101500(Petroleum and distillates)
ASTM D4952-12, Standard Test Method for Qualitative Analysis for Active Sulfur Species in Fuels and Solvents (Doctor Test), ASTM International, West Conshohocken, PA, 2012, www.astm.orgBack to Top