Designation: D7771 − 17Standard Test Method forDetermination of Benzo-α-Pyrene (BaP) Content in CarbonBlack 1This standard is issued under the f i xed designation D7771; 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. Scope1.1 This test method covers the qualitative and quantitativedetermination of only benzo-α-pyrene (BaP), a specif i c poly-cyclic aromatic hydrocarbon (PAH), on carbon black. Theprocedure involves Soxhlet extraction with toluene and analy-sis by gas chromatography with mass spectrometry (GC/MS).This method is not intended to test for U.S. Food and DrugAdministration (FDA21 CFR 178.3297) compliance of carbonblacks used for indirect food contact applications.1.2 Units—The values stated in SI units are to be regardedas the standard. No other units of measurement are included inthis standard.1.3 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.2. Referenced Documents2.1 ASTM Standards: 2D4483 Practice for Evaluating Precision for Test MethodStandards in the Rubber and Carbon Black ManufacturingIndustries2.2 EPA Standard: 3Method 8270D Semivolatile Organic Compounds by GasChromatography/Mass Spectrometry (GC/MS)2.3 Federal Standard:21 CFR 178.3297 Indirect Food Additives: Adjuvants, Pro-ductions Aids, and Sanitizers, Colorants for Polymers 43. Terminology3.1 Def i nitions of Terms Specif i c to This Standard:3.1.1 benzo-α-pyrene, BaP, n—also known as 3,4-benzopyrene or benzo-a-pyrene is a specif i c polycyclic aro-matic hydrocarbon (PAH) or polynuclear aromatic hydrocar-bon that consists of fused aromatic rings with no heteroatom orsubstituent.3.1.1.1 Discussion—PAHs naturally occur in oil, coal, andtar deposits; are produced by the incomplete combustion ofhydrocarbons; and occur in many other products and processes.BaP is a pentacyclic PAH with the formula C 20 H 12 , related topyrene by fusion of a phenylene group in the alpha position.4. Summary of Test Method4.1 A portion of carbon black is Soxhlet-extracted withtoluene for 16 h. The extract is concentrated and subsequentlyanalyzed for BaP by gas chromatography with mass spectrom-etry (GC/MS). The BaP quantif i cation is performed by themeans of an internal standard.5. Signif i cance and Use5.1 This test procedure is used to determine the concentra-tion of BaP extracted from carbon black by the means of aSoxhlet extraction apparatus with toluene.6. Apparatus6.1 Soxhlet Extractor with Ref l ux Condenser, 50- or 100-cm 3 capacity.6.2 Extraction Thimbles, glass or cellulose, approximately50- to 70-cm 3 capacity. For instance, glass extraction thimbleof 35-mm diameter by 90-mm height with course porosity (70to 100 µm similar to Ace Glass Size C, Porosity B, Code-14).1 This test method is under the jurisdiction of ASTM Committee D24 on CarbonBlack and is the direct responsibility of Subcommittee D24.66 on Environment,Health, and Safety.Current edition approved Jan. 1, 2017. Published January 2017. Originallyapproved in 2011. Last previous edition approved in 2015 as D7771 – 15. DOI:10.1520/D7771-17.2 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 Available from United States Environmental Protection Agency (EPA), ArielRios Bldg., 1200 Pennsylvania Ave., NW, Washington, DC 20004, http://www.epa.gov/epaoswer/hazwaste/test/new-meth.htm#8270D.4 Available from the U.S. Government Printing Office, Superintendent ofDocuments, 732 N. Capital St., NW., Washington, DC 20402-0001.Copyright © 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 Copyright by ASTM Int'l (all rights reserved); Sat Oct 7 00:17:30 EDT 2017Downloaded/printed byUniversity of Edinburgh (University of Edinburgh) pursuant to License Agreement. No further reproductions authorized.
