1、Designation:D717116Standard Test Method forHydrogen Content of Middle Distillate Petroleum Productsby Low-Resolution Pulsed Nuclear Magnetic ResonanceSpectroscopy1This standard is issued under the fixed designation D7171;the number immediately following the designation indicates the year oforiginal
2、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.Scope*1.1 This test method covers the determination of the hydro-gen content of midd
3、le distillate petroleum products using alow-resolution pulsed nuclear magnetic resonance(NMR)spectrometer.The boiling range of distillates covered by thetest method is 150 C to 390 C.While this test method may beapplicable to middle distillates outside this boiling range,insuch cases the precision s
4、tatements may not apply.The testmethod is generally based on Test Methods D3701 and D4808,with a major difference being the use of a pulsed NMRspectrometer instead of a continuous wave NMR spectrometer.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are
5、included in thisstandard.1.2.1 The preferred units are mass%.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-bil
6、ity of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D3701 Test Method for Hydrogen Content of AviationTurbine Fuels by Low Resolution Nuclear MagneticResonance SpectrometryD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4808 Test Methods for Hyd
7、rogen Content of LightDistillates,Middle Distillates,Gas Oils,and Residua byLow-Resolution Nuclear Magnetic Resonance Spectros-copyD5291 Test Methods for Instrumental Determination ofCarbon,Hydrogen,and Nitrogen in Petroleum Productsand LubricantsD6299 Practice for Applying Statistical Quality Assur
8、anceand Control Charting Techniques to Evaluate AnalyticalMeasurement System PerformanceD6708 Practice for Statistical Assessment and Improvementof Expected Agreement Between Two Test Methods thatPurport to Measure the Same Property of a Material2.2 Other Documents:MIL-DTL-5624 Turbine Fuel,Aviation
9、,Grades JP-4 andJP-53MIL-DTL-83133 Turbine Fuel,Aviation,Kerosene Type,JP-8(NATO F-34),NATO F-35,and JP-8+100(NATOF-37)MIL-DTL-16884 Fuel,Naval Distillate3.Terminology3.1 Definitions:3.1.1 calibration,nthe determination of the values of thesignificant parameters by comparison with values indicated b
10、ya set of calibration standards.3.1.2 calibration curve(or calibration line),nthe graphi-cal or mathematical representation of a relationship betweenthe assigned(known)values of calibration standards and themeasured responses from the measurement system.3.1.3 calibration standard,na standard having
11、an as-signed(known)value(reference value)for use in calibrating ameasurement instrument or system.This standard is not used todetermine the accuracy of the measurement instrument orsystem(see check standard).3.1.4 check standard,na material having an assigned(known)value(reference value)used to dete
12、rmine the accu-racy of the measurement instrument or system.This standard is1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.03 on Elemental Analysis.Current edition approved Oct.1,2
13、016.Published October 2016.Originallyapproved in 2005.Last previous edition approved in 2016 as D7171 05(2016).DOI:10.1520/D7171-16.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume informatio
14、n,refer to the standards Document Summary page onthe ASTM website.3AvailableonlineattheASSISTQuickSearchwebsitehttp:/quicksearch.dla.mil.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.Uni
15、ted States1 not used to calibrate the measurement instrument or system(see calibration standard).3.1.5 low resolution nuclear magnetic resonance(NMR)spectroscopy,na form of NMR spectroscopy using a simpleNMR analyzer that employs a low magnetic field and conse-quentially low NMR frequency.An example
16、 is proton NMRbelow 60 MHz.Resolution is expressed as time at half heightof signal and is typically 1 millisecond(ms)or less.3.1.6 nuclear magnetic resonance(NMR)spectroscopy,nthat form of spectroscopy concerned with radio-frequency-induced transitions between magnetic energy levels of atomicnuclei.3.1.7 radio frequency,nthe range of frequencies of elec-tromagnetic radiation between 3 kHz and 300 GHz.3.1.8 recycle delay,nNMR spectrometer parameter set-ting for the time delay that allows magnetiz
