ASTM_D_8311_-_20.pdf

Designation:D831120Standard Test Method forImpurities in Monoethylene Glycol by Gas Chromatographywith Normalization1This standard is issued under the fixed designation D8311;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 gas chromatographic deter-mination of impurities in monoethylene glycol including 1,3-dioxolane-2-methanol,diethylene glycol(DEG)and triethyl-ene glycol(TEG).The purity of monoethylene glycol(MEG)is also calculated.A similar test method,using the internalstandard calibration technique and the external standard cali-bration technique,is Test Method E2409.1.2 This test method is applicable for monoethylene glycolpurities of 98.0 mass%or higher.1.3 The limit of detection(LOD)for 1,3-dioxolane-2-methanol,DEG and TEG is 0.0002 mass%.1.4 In determining the conformance of the test results usingthis method to applicable specifications,results shall berounded off in accordance with the rounding-off method ofPractice E29.1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.6 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.7 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:2D6809 Guide for Quality Control and Quality AssuranceProcedures for Aromatic Hydrocarbons and Related Ma-terialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE300 Practice for Sampling Industrial ChemicalsE355 Practice for Gas Chromatography Terms and Relation-shipsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE1064 Test Method for Water in Organic Liquids by Coulo-metric Karl Fischer TitrationE1510 Practice for Installing Fused Silica Open TubularCapillary Columns in Gas ChromatographsE2409 Test Method for Glycol Impurities in Mono-,Di-,Tri-and Tetraethylene Glycol and in Mono-and DipropyleneGlycol(Gas Chromatographic Method)2.2 Other Document:OSHA Regulations,29 CFR paragraphs 1910.1000 and1910.120033.Summary of Test Method3.1 The specimen to be analyzed is injected into a gaschromatograph equipped with a flame ionization detector(FID)and a capillary column.3.2 The peak area of each component is measured andadjusted using relative calibration factors.The concentration ofeach component is calculated based on its relative percentagesof total adjusted peak area and normalized to 100.0000%.1This test method is under the jurisdiction of ASTM Committee D16 onAromatic,Industrial,Specialty and Related Chemicals and is the direct responsi-bility of Subcommittee D16.14 on Alcohols&Glycols.Current edition approved April 1,2020.Published May 2020.DOI:10.1520/D8311-20.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from Occupational Safety and Health Administration(OSHA),200Constitution Ave.,NW,Washington,DC 20210,http:/www.osha.gov.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.4.Significance and Use4.1 This test method is suitable for setting specifications andfor use as an internal quality control tool where these productsare produced or are used.Typical impurities are:1,3-dioxolane-2-methanol,diethylene glycol,and triethylene gly-col.4.2 This method may not detect all components and theremay be unknown components that would be assigned inappro-priate relative calibration factors and thus,the results may notbe absolute.5.Apparatus5.1 Gas ChromatographAny instrument having a flameionization detector and a splitter injector suitable for use witha fused silica capillary column may be used,provided thesystem has sufficient sensitivity,linearity,and range to deter-mine 0.0001 mass%,while n