ASTM D7111-2015 red 3443 Standard Test Method for Determination of Trace Elements in Middle Distillate Fuels by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES)《采用.pdf
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1、Designation: D7111 14D7111 15Standard Test Method forDetermination of Trace Elements in Middle Distillate Fuelsby Inductively Coupled Plasma Atomic EmissionSpectrometry (ICP-AES)1This standard is issued under the fixed designation D7111; the number immediately following the designation indicates the
2、 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. Scope*1.1 This test method covers the determination of selec
3、ted elements in middle distillate fuels by inductively coupled plasmaatomic emission spectrometry (ICP-AES). The specific elements are listed in Table 1. The concentration range of this test methodis approximately 0.10.1 mgkg to 2.0 mg/kg. The test method may be used for concentrations outside of th
4、is range; however, theprecision statements may not be applicable. Middle distillate fuels covered in this test method have all distillation fractionscontained within the boiling range of 150150 C to 390C.390 C. This includes, but is not limited to, diesel fuels and aviationturbine fuels.1.2 This tes
5、t method is not intended to analyze insoluble particulates. However, very small particulate matter (smaller than amicrometre) will be carried into the plasma and be included in the quantitative analysis.1.3 This test method may give a result that is higher than the true value if an analyte is presen
6、t in the sample in a form whichis sufficiently volatile. For example, hexamethyldisiloxane will generate a biased high result for silicon.1.4 The values stated in SI units are to be regarded as standard.1 This test method is under the jurisdiction ofASTM Committee D02 on Petroleum Products, Liquid F
7、uels, and Lubricants and is the direct responsibility of SubcommitteeD02.03 on Elemental Analysis.Current edition approved May 1, 2014April 1, 2015. Published July 2014May 2015. Originally approved in 2005. Last previous edition approved in 20112014 asD7111 11.D7111 14. DOI: 10.1520/D7111-14.10.1520
8、/D7111-15.TABLE 1 Elements and Recommended WavelengthsElement Wavelengths, nmAluminum 308.215, 396.153Barium 455.403, 493.408Calcium 393.366Chromium 267.716, 283.563Cobalt 228.615, 236.375, 238.892Copper 324.752Iron 259.939Lithium 670.784Lead 220.353, 224.688, 283.306Magnesium 279.553Manganese 257.6
9、10Molybdenum 202.030, 204.597, 281.616Nickel 221.648, 341.476Phosphorus 177.495, 178.287,185.944, 214.914, 213.618Palladium 340.458, 342.124Platinum 214.423Potassium 766.490Sodium 588.995Silicon 251.611Silver 328.068Strontium 407.771Tin 283.999, 189.991Titanium 334.940Vanadium 310.230Zinc 213.857Thi
10、s document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editio
11、ns as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*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.
12、United States11.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2.
13、Referenced Documents2.1 ASTM Standards:2D2880 Specification for Gas Turbine Fuel OilsD3605 Test Method for Trace Metals in Gas Turbine Fuels by Atomic Absorption and Flame Emission SpectroscopyD4057 Practice for Manual Sampling of Petroleum and Petroleum ProductsD4306 Practice for Aviation Fuel Samp
14、le Containers for Tests Affected by Trace ContaminationD5185 Test Method for Multielement Determination of Used and Unused Lubricating Oils and Base Oils by InductivelyCoupled Plasma Atomic Emission Spectrometry (ICP-AES)D6299 Practice for Applying Statistical Quality Assurance and Control Charting
15、Techniques to Evaluate Analytical Measure-ment System PerformanceD6792 Practice for Quality System in Petroleum Products and Lubricants Testing LaboratoriesD7260 Practice for Optimization, Calibration, and Validation of Inductively Coupled Plasma-Atomic Emission Spectrometry(ICP-AES) for Elemental A
16、nalysis of Petroleum Products and Lubricants2.2 Military Standard:MIL-F-16884MMIL-DTL-16884 Military Specification, Fuel, Naval Distillate33. Terminology3.1 Definitions:3.1.1 calibration, nthe determination of the values of the significant parameters by comparison with values indicated by a setof re
17、ference standards.3.1.2 calibration curve, nthe graphical or mathematical representation of a relationship between the assigned (known) valuesof standards and the measured responses from the measurement system.3.1.3 calibration standard, na standard having an accepted value (reference value) for use
18、 in calibrating a measurementinstrument or system.3.1.4 detection limit, na stated limiting value that designates the lowest concentration that can be determined with confidenceand that is specific to the analytical procedure used.3.1.5 emission spectroscopy, nmeasurement of the energy spectrum emit
19、ted by or from an object under some form of energeticstimulation; for example, light or electrical discharge.3.1.6 inductively coupled plasma, na high temperature discharge generated by passing an ionizable gas through a magneticfield induced by a radio frequency coil surrounding the tubes that carr
20、y the gas.3.1.7 radio frequency, nthe range of frequencies between 3 kHz and 300 GHz.3.1.8 standard, na physical or chemical reference used as a basis for comparison or calibration.3.2 Definitions of Terms Specific to This Standard:3.2.1 detection limit, nthe lowest concentration value for an elemen
21、t that can be determined by ICP analysis and that iscalculated by multiplying three times the standard deviation of ten repetitive element analyses of the blank solution.3.2.2 internal standard, na chemical standard having an accepted value (and added to the fuel test specimen and calibrationstandar
22、d) to determine the emission intensity ratio of an element to the internal standard.4. Summary of Test Method4.1 Calibration standards are prepared by mixing organometallic standard materials in kerosine. An internal standard materialis added to the calibration standards and fuel samples. The calibr
23、ation standards and the fuel samples are aspirated into theICP-AES instrument. The concentrations of the elements in the fuel are calculated by comparing emission intensity ratios of thefuel and calibration standards to the internal standard.4.2 Consult Practice D7260 regrading the optimum operation
24、 of any ICP-AES system.5. Significance and Use5.1 Trace elemental analysis is used to indicate the level of contamination of middle distillate fuels. Trace metals in turbine fuelscan cause corrosion and deposition on turbine components at elevated temperatures. Some diesel fuels have specification l
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