ASTM D5845-2001(2006) Standard Test Method for Determination of MTBE ETBE TAME DIPE Methanol Ethanol and tert-Butanol in Gasoline by Infrared Spectroscopy《用红外线光谱法测定汽油中MTBE、ETBE、TAM.pdf
《ASTM D5845-2001(2006) Standard Test Method for Determination of MTBE ETBE TAME DIPE Methanol Ethanol and tert-Butanol in Gasoline by Infrared Spectroscopy《用红外线光谱法测定汽油中MTBE、ETBE、TAM.pdf》由会员分享,可在线阅读,更多相关《ASTM D5845-2001(2006) Standard Test Method for Determination of MTBE ETBE TAME DIPE Methanol Ethanol and tert-Butanol in Gasoline by Infrared Spectroscopy《用红外线光谱法测定汽油中MTBE、ETBE、TAM.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D 5845 01 (Reapproved 2006)An American National StandardStandard Test Method forDetermination of MTBE, ETBE, TAME, DIPE, Methanol,Ethanol and tert-Butanol in Gasoline by InfraredSpectroscopy1This standard is issued under the fixed designation D 5845; the number immediately following the
2、 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 (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers
3、the determination of methanol,ethanol, tert-butanol, methyl tert-butyl ether (MTBE), ethyltert-butyl ether (ETBE), tert-amyl methyl ether (TAME), anddiisopropyl ether (DIPE) in gasoline by infrared spectroscopy.The test method is suitable for determining methanol from 0.1to 6 mass %, ethanol from 0.
4、1 to 11 mass %, tert-butanol from0.1 to 14 mass %, and DIPE, MTBE, ETBE and TAME from0.1 to 20 mass %.1.2 SI units of measurement are preferred and used through-out this standard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is therespon
5、sibility 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:2D 1298 Test Method for Density, Relative Density (SpecificGravity), or API Gravity of Crude P
6、etroleum and LiquidPetroleum Products by Hydrometer MethodD 4052 Test Method for Density and Relative Density ofLiquids by Digital Density MeterD 4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD 4307 Practice for Preparation of Liquid Blends for Use asAnalytical StandardsD 4815
7、Test Method for Determination of MTBE, ETBE,TAME, DIPE, tertiary-Amyl Alcohol and C1to C4Alco-hols in Gasoline by Gas ChromatographyD 5599 Test Method for Determination of Oxygenates inGasoline by Gas Chromatography and Oxygen SelectiveFlame Ionization DetectionE 1655 Practices for Infrared Multivar
8、iate QuantitativeAnalysis2.2 Other Standard:3GC/OFID EPA Test MethodOxygen and Oxygenate Con-tent Analysis (by way of gas chromatography withoxygen-selective flame ionization detection)3. Terminology3.1 Definitions:3.1.1 oxygenate, nan oxygen-containing organic com-pound, which may be used as a fuel
9、 or fuel supplement, forexample, various alcohols or ethers.3.1.2 multivariate calibration, na process for creating acalibration model in which multivariate mathematics is appliedto correlate the absorbances measured for a set of calibrationsamples to reference component concentrations or propertyva
10、lues for the set of samples. The resultant multivariatecalibration model is applied to the analysis of spectra ofunknown samples to provide an estimate of the componentconcentration or property values for the unknown sample.4. Summary of Test Method4.1 A sample of gasoline is introduced into a liqui
11、d samplecell. A beam of infrared light is imaged through the sampleonto a detector, and the detector response is determined.Regions of the infrared spectrum are selected for use in theanalysis by either placing highly selective bandpass filtersbefore or after the sample or mathematically selecting t
12、heregions after the whole spectrum is obtained. A multivariatemathematical analysis is carried out which converts the detec-tor response for the selected regions in the spectrum of anunknown to a concentration for each component.5. Significance and Use5.1 Alcohols and ethers are added to gasoline to
13、 produce areformulated lower emissions gasoline. Alcohols and ethersmay also be added to gasoline to increase the octane number.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.04.0F on Absorptio
14、n Spectroscopic Methods.Current edition approved Dec. 1, 2006. Published January 2007. Originallyapproved in 1995. Last previous edition approved in 2001 as D 5845 01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual
15、Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Code of Federal Regulations, Part 80 of Title 40, Section 80.46(g); alsopublished in the Federal Register, Volume 59, No. 32, February 16, 1994, p 7828.1Copyright ASTM International, 100 Barr H
16、arbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Type and concentration of various oxygenates are specified andregulated to ensure acceptable commercial gasoline quality.Driveability, vapor pressure, phase separation, and evaporativeemissions are some of the concerns associa
17、ted with oxygenatedfuels.5.2 This test method is faster, simpler, less expensive andmore portable than current methods.5.3 This test method may be applicable for quality control inthe production of gasoline.5.4 This test method is not suitable for testing for compli-ance with federal regulations.35.
18、5 False positive readings for some of the samples tested inthe round robin were sometimes observed. As only extremebase gasolines were tested in the round robin, no definitivestatement can be made as to the expected frequency ormagnitude of false positives expected in a wider range of basegasolines.
19、6. Apparatus6.1 Mid-IR Spectrometric Analyzer, of one of the followingtypes:6.1.1 Filter-based Mid-IR Test ApparatusThe type ofapparatus suitable for use in this test method minimallyemploys an IR source, an infrared transmission cell or a liquidattenuated total internal reflection cell, wavelength
20、discrimi-nating filters, a chopper wheel, a detector, an A-D converter, amicroprocessor, and a sample introduction system.6.1.2 Fourier Transform Mid-IR Test ApparatusThe typeof apparatus suitable for use in this test method employs an IRsource, an infrared transmission cell or a liquid attenuated t
21、otalinternal reflection cell, a scanning interferometer, a detector, anA-D converter, a microprocessor and a sample introductionsystem.6.1.3 Dispersive Mid-IR Test ApparatusThe type of appa-ratus suitable for use in this test method minimally employs anIR source, an infrared transmission cell or a l
22、iquid attenuatedtotal internal reflection cell, a wavelength dispersive elementsuch as a grating or prism, a chopper wheel, a detector, an A-Dconverter, a microprocessor and a sample introduction system.7. Reagents and Materials7.1 Samples for Calibration and Quality Control CheckSolutionsUse of che
23、micals of at least 99 % purity is highlyrecommended when preparing calibration and quality controlcheck samples. If reagents of high purity are not available, anaccurate assay of the reagent must be performed using aproperly calibrated GC or other techniques (for example, waterdetermination).7.1.1 B
24、ase gasolines containing no oxygenates,7.1.2 Methanol,7.1.3 Ethanol,7.1.4 tert-Butanol,7.1.5 Methyl tert-butyl ether, MTBE,7.1.6 Ethyl tert-butyl ether, ETBE,7.1.7 tert-Amyl methyl ether, TAME, and7.1.8 Diisopropyl ether, DIPE.7.2 WarningThese materials are flammable and may beharmful if ingested or
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