1、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 fo
2、r 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 t
3、he 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 aromati
4、c 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
5、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
6、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
7、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
8、 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 s
9、electivity 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
10、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 14.0
11、1.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
12、.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 avi
13、ation 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
14、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 Blen
15、d 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.
16、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
