ASTM_D_2267_-_88_scan.pdf

ASTM D22b7 88 W 07595l10 0024848 4(&Designation:D 2267-88 AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 flaw SI.Philadelohia.Pa.19103 Reprinled from the Annual Book o f ASTU Standards:Copyright ASTM If not listed in the current combined index.will appear in ihe next edition.Standard Test Method for Aromatics in Light Naphthas and Aviation Gasolines by Gas Chromatography This standad b issued under the fixed designation D 2267;the number immediately following the deggnation indicates the year of orkhai w o n or,i n the c a s e ofnaon.the year of last dsion,A number i n partnthese5 indicates the year oflast reapproval A wpecscnpt W o n (e)indicates an dtoiiai chaiige s i w tbe last revision o r reapproval.1.Scope 1.1 This test method covers the determination of benzene,toluene,C,and heavier aromatics,and total aromatics in the concentration range from 1.0 to 3 0%of the individuai aromatic compounds sted above in the following products:(I)aviation gasolines described in Specification D 910;(2)reformer products having a final boiling point below 350F(1 7 7 C);and(3)reformer feed and other petroleum products having a final boiling point below 300F(1 4 9 C).The results N m 1 T M M e t h o d D2600 should be u s e d to determine aro-matics i n concentrations b e l o w 1.0.1.2 The values stated in inch-pound units are to be regarded as the standard.The values givenin S I units are for information only.1.3 This standard may involve hazardous materialsl oper-ations,and equipment.This standard does not purport to address all ofthe sqfety problems associated with its me.It i s the responsibility o f the user o f this standard to establish appropriate sdety and health practices and determine the appIcability o f regulatory limitations prior to use.For Specinc hazard statements,see Notes 3,4,5,6,8,9,1 0,11,12,13,14,and Annex Al.2.Referenced Documents 2.1 ASTM Standards:D910 Specification for Aviation Gasolines2 D260Q Test Method for Aromatic Trace In Light Satu-E 260 Practice for Packed Column Gas Chromatography4 reported to the nearest 0.1%by liquid volume.rated H y d r o c a r b o n s by Gas Chromatographf 3.SIrmmnry of Test Metho 3.1 The sample is introduced into a gas chromatographic column containing a strongly polar liquid phase.The polar phase has very little anity for saturated and olenic hydrocarbons,while exhibiting a pronounced selectivity for aromatics.This selectivity results in the elution of a i l saturated and olefinic hydrocarons in the products d e scribed above prior ta the elution of benzene.Can either a thermal conductiyitY or flame ionization detector be use.This test metbod is under the jurisdiction of ASTM mmitt D-2 on petrokum Producri and Lubricants and is the direct nsponsiity of i%bOorn-mittee Do2.04 on Hydrocarbon An&.Currmt dtion-;cd NOV.17,1988.PuMishtd December 1988.origllrally pibiisi#d D 2267-64.Last&OU d t i n I)2267-83.Annual W k cfASTM SrMdardr.Vol 05.0 1.Anmral Bd d A s T M S t-,Voi 05.02.Atmud kbok dASTM Ran&rak Vol 14.01.Calibration is performed by Using synthetic blends of the aromatic compounds charged at the same constant volume as is used to analyze the sample.n-undecane or ndodecane is used as an internal standard.T y p i c a l retention t i m a are shown in Table 1 and a typical chromatogram i s shown in Fig.i.NOTE 2-Reference should be made to Practice E 260.NOTE 3 Warning-Naphthas and gasoiines are extremely!lam-mable,harmfUiifinhaid,see Annex Al.1.Precautionary statementsfor individuai compounds follow in text,4.Significance and Use 4.1 A knowledge of aromatic hydrocarbons in light naph-thas and aviation gasolines is needed to assess product quality and meet specifications for aromatics as may be set by consumers and regulatory agencies.5.Apparatus 5.1 Chromatograph-Any chromatographic instrument may be used which has the following performance and characteristics:5.1.1 Sensitivity-An over-ail sensitivity sufficient to d e tect 0.1 volume%of any aromatic compound of interest with a peak height of at least 2 mm without loss of resolution as defiued in 5.1.3.5.1.2 Sample Inlet Sysfem-A sample inlet system that ailows a constant volume of liquid sample to be injected.5.1.3 Column-Inject Blend 1,Table 2,into the chro-matograph and record the chromatogram.(Warning-see Notes 4,5,and 6.)Any column and conditions may be used provided,under conditions of the test,n-decane is eluted prior to benzene and the depth of the valiey after ndecane is not les than 50%of the height of the decane peak.The benzene,toluene,and C,and heavier aromatics must be completely resolved from each other,and the internal standard,n-undecane or n-dodecane,must be completely separated tiom a l i aromatic compounds.ifswallowed;see Annex A1.2.harmful;s e e Annexes AL3 and A1.4,mpectively.Noni 4:Wmbg-Benzene i s a poison,d o g e n,hamhi or fatai Nora 5:Warning-Toluene and ehylbenzene are flammable.vapot cokmi 1 2 3 4 6 Rdecwe 2.3 8.8 2.8 2.0 102 Benzene 2.9 7.8 3.0 3.3 15 Tokiene 4.5 11.4 4.3 5.3 19.1 Ethylben