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Designation: D6258 − 17Standard Test Method forDetermination of Solvent Red 164 Dye Concentration inDiesel Fuels 1This standard is issued under the f i xed designation D6258; 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 (´) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This test method covers the procedure for determiningthe concentration of dye Solvent Red 164 in commerciallyavailable diesel and burner fuels using visible spectroscopy.N OTE 1—This test method is suitable for all No. 1 and No. 2 grades inSpecif i cations D396 and D975 and for grades DMA and DMB inSpecif i cation D2069.1.2 The concentration ranges specif i ed for the calibrationstandards are established in response to the Internal RevenueService dyeing requirements which state that tax-exempt dieselfuel satisf i es the dyeing requirement only if it contains the dyeSolvent Red 164 (and no other dye) at a concentrationspectrally equivalent to 3.9 lb of the solid dye standard SolventRed 26 per thousand bbl (11.1 mg/L) of diesel fuel.1.3 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards: 2D396 Specif i cation for Fuel OilsD975 Specif i cation for Diesel Fuel OilsD2069 Specif i cation for Marine Fuels (Withdrawn 2003) 3D3699 Specif i cation for KerosineD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsE131 Terminology Relating to Molecular SpectroscopyE169 Practices for General Techniques of Ultraviolet-VisibleQuantitative AnalysisE275 Practice for Describing and Measuring Performance ofUltraviolet and Visible SpectrophotometersE288 Specif i cation for Laboratory Glass Volumetric FlasksE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE969 Specif i cation for Glass Volumetric (Transfer) Pipets2.2 Federal Regulation:26 CFR 48.4082-1(b) Federal Excise Tax Regulation3. Terminology3.1 Def i nitions:3.1.1 For def i nitions of terms used in this test method, referto Terminology E131.4. Summary of Test Method4.1 The absorbance of each sample is recorded over aspecif i ed wavelength range, and the scan is analyzed usingderivative analysis software to determine the dye concentra-tion.4.2 Derivative analysis methodology is employed to mini-mize interferences caused by variations in the color andcomposition of the fuel samples regularly tested using this testmethod.4.2.1 Naturally occurring diesel test fuels range in colorfrom water white to nearly black, and many of the samplestested using this test method have also had used oils and otherproducts blended with them. These variations in color andcomposition have a signif i cant effect upon absorbance charac-teristics of the samples in the region of the visible spectrumwhere azo dyes absorb. Standard operating procedures tocorrect for these background variations would involve running1 This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility ofSubcommittee D02.05 on Properties of Fuels, Petroleum Coke and Carbon Material.Current edition approved May 1, 2017. Published May 2017. Originallyapproved in 1998. Last previous edition approved in 2014 as D6258 – 09 (2014).DOI: 10.1520/D6258-17.2 For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at service@astm.org. For Annual Book of ASTMStandards volume information, refer to the standard’s Document Summary page onthe ASTM website.3 The last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1