ASTMD4530-2003

Designation:D 4530-03An American Nafional StandardNTERNATIONALStandard Test Method forDetermination of Carbon Residue (Micro Method)1This standard is issued under the fixed designation D4530;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon (e)indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1.Scope*priate safety practices and to determine the applicability of1.1 This test method covers the determination of the amountregulatory limitations prior to use.For specifc warningof carbon residue (see Note 1)formed after evaporation andstatements,see 8.2.3 and 8.4pyrolysis of petroleum materials under certain conditions and2.Referenced Documentsis intended to provide some indication of the relative cokeforming tendency of such materials2.1 ASTM Standards:1.2 The test results are equivalent to the Conradson CarbonD 189 Test Method for Conradson Carbon Residue ofResidue test (see Test Method D 189Petroleum Products'D 482 Test Method for Ash from Petroleum Products3NorE 1-This procedure is a modification of the original method andD 4046 Test Method for Alkyl Nitrate in Diesel Fuels byapparatus for carbon residue of petroleum materials,where it has beenSpectrophotometry"demonstrated that thermogravimetry is another applicable technique.2However,it is the responsibility of the operator to establish operatingD 4057 Practice for Manual Sampling of Petroleum andconditions to obtain equivalent results when using thermogravimetry.Petroleum Products41.3 This test method is applicable to petroleum products thatD 4177 Practice for Automatic Sampling of Petroleum andpartially decompose on distillation at atmospheric pressure andPetroleum Productswas tested for carbon residue values of 0.10 to 30%(m/m).E 1 Specifi cation for ASTM Thermometers5Samples expected to be below 0.10 weight %(m/m)residueE 133 Specifi cation for Distillation Equipment22 IP Standard:should be distilled to remove 90%(V/V)of the flask charge(see Section9).The 10%bottoms remaining is then tested forSpecif cation for IP Standard Thermometers 7carbon residue by this test method.3.Terminology1.4 Ash-forming constituents,as defi ned by Test Method3.1 Defnitions:D 482 or non-volatile additives present in the sample will addto the carbon residue value and be included as part of the total3.1.1 carbon residue,nin petroleum products,the partremaining after a sample has been subjected to thermalcarbon residue value reported.decomposition.1.5 Also in diesel fuel,the presence of alkyl nitrates,such as3.1.1.1 Discussion-The amount of residue is dependent onamyl nitrate,hexyl nitrate,or octyl nitrate,causes a highercarbon residue value than observed in untreated fuel,whichthe test conditions of evaporation and pyrolysis.The term maybe misleadi