1、Designation: D1500 12Designation: 196/97Standard Test Method forASTM Color of Petroleum Products (ASTM Color Scale)1This standard is issued under the fixed designation D1500; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year
2、 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.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This test method covers the visu
3、al determination of thecolor of a wide variety of petroleum products, such aslubricating oils, heating oils, diesel fuel oils, and petroleumwaxes.NOTE 1Test Method D156 is applicable to refined products that havean ASTM color lighter than 0.5.1.2 This test method reports results specific to the test
4、method and recorded as “ASTM Color.”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-bility of regulatory limi
5、tations prior to use.2. Referenced Documents2.1 ASTM Standards:2D156 Test Method for Saybolt Color of Petroleum Products(Saybolt Chromometer Method)D938 Test Method for Congealing Point of PetroleumWaxes, Including PetrolatumD2500 Test Method for Cloud Point of Petroleum ProductsD4057 Practice for M
6、anual Sampling of Petroleum andPetroleum Products3. Summary of Test Method3.1 Using a standard light source, a liquid sample is placedin the test container and compared with colored glass disksranging in value from 0.5 to 8.0. When an exact match is notfound and the sample color falls between two st
7、andard colors,the higher of the two colors is reported.4. Significance and Use4.1 Determination of the color of petroleum products is usedmainly for manufacturing control purposes and is an importantquality characteristic, since color is readily observed by theuser of the product. In some cases, the
8、 color may serve as anindication of the degree of refinement of the material. When thecolor range of a particular product is known, a variation outsidethe established range may indicate possible contamination withanother product. However, color is not always a reliable guideto product quality and sh
9、ould not be used indiscriminately inproduct specifications.5. Apparatus5.1 Colorimeter, consisting of light source, glass colorstandards, sample container housing with cover, and viewingpiece as listed in Annex A1.5.2 Sample ContainerFor referee work, use the glasssample jar as shown in Fig. 1. For
10、routine tests, it is permissibleto use a cylindrical, clear glass jar with a flat bottom of 30 to32.4 mm internal diameter, 115 to 125 mm in external height,and a wall thickness no greater than 1.6 mm as specified in TestMethod D2500, or an ordinary 125-mL oil sample bottle if itmeets these requirem
11、ents.5.3 Ultrasonic Bath, Unheated (optional)of suitable di-mensions to hold container(s) placed inside of bath, for use ineffectively dissipating and removing air or gas bubbles that canbe entrained in viscous sample types prior to analysis.6. Sampling6.1 Samples shall be taken in accordance with t
12、he instruc-tions in Practice D4057.6.2 For some sample types, such as viscous lube oils that areprone to having entrained air or gas bubbles present in thesample, the use of an ultrasonic bath (see 5.3) without theheater turned on (if so equipped), has been found effective indissipating bubbles typi
13、cally within 10 min.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.05 on Properties of Fuels, Petroleum Coke and Carbon Material.Current edition approved Dec. 1, 2012. Published March 2013. Ori
14、ginallyapproved in 1957. Last previous edition approved in 2007 as D150007. DOI:10.1520/D1500-12.This is also a standard of Energy Institute issued under the fixed designation IP196. The final number indicates the year of last revision. This test method wasadopted as a jointASTM-IP standard in 1966.
15、 In the IP, this test method is under thejurisdiction of the Standardization Committee.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summar
16、y page onthe ASTM website.*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. United States17. Diluent7.1 Solvent Kerosine (WarningCombustible. Vaporharmful.) Having a color lighter than
17、+21 Saybolt color by TestMethod D156, this material is used for diluting dark samplesfor the test. As an alternative, other solvents, such as white oilor solvent neutral 100 of satisfactory purity that meet the colorrequirements specified here in 7.1, are also acceptable.NOTE 2Solvent kerosine compl
18、ies with this requirement if it is lighterin color than potassium dichromate (K2Cr2O7) solution formed bydissolving 4.8 mg of pure anhydrous K2Cr2O7in 1 L of distilled water.8. Preparation of Sample8.1 Liquid Petroleum Products such as Lubricating OilsFill the sample container to a depth of 50 mm or
19、 more andobserve the color. When the sample is not clear, heat it justsufficiently enough to make it clear to perform the colormeasurement at that temperature. A sample heated to a tem-perature of 6C (10F) above its cloud point (see Test MethodD2500) has been found suitable to test samples using thi
20、s testmethod. When the sample is darker than 8 color, one mayeither stop the test and report “D8 ASTM Color” (see 10.2)orcontinue the test and mix 15 volumes of sample into 85volumes of solvent kerosine or alternative material (see 7.1)and observe the color of the mixture.8.2 Petroleum Waxes, Includ
21、ing PetrolatumHeat thesample just sufficiently enough to make it fluid and clear toperform the color measurement at that temperature withoutheating the wax excessively, because oxidation can occur,along with consequent discoloration of the test specimen. Asample heated to a temperature of 11 to 17C
22、(20 to 30F)above its congealing point, as determined in accordance withTest Method D938, has been found suitable to test samplesusing this test method. When the sample is darker than 8 color,one may either stop the test and report “D8 ASTM Color” (see10.2) or continue the test and mix 15 volumes of
23、melted samplewith 85 volumes of solvent kerosine or alternative material (see7.1) brought to the same temperature and test the mixture atthat temperature.9. Procedure9.1 Place a sample container or containers, filled to a depthof at least 50 mm with distilled or deionized water, in thecompartment or
24、 compartments of the colorimeter throughwhich the standard glasses will be observed. Place the samplein its container in the other compartment. (When using athree-field comparator, this will be the middle compartment.)Cover the containers to exclude all exterior light.9.2 Switch on the light source
25、and compare the color of thesample with that of the standard glasses. When using athree-field comparator, the sample must be bracketed by darkerand lighter discs or by an exact match and a darker disc.Determine for two-field comparators which glass matches thecolor of the sample; or if an exact matc
26、h is not possible, thenuse that glass which possesses the next darker color.10. Report10.1 Report as the color of the sample, the designation ofthe glass producing a matching color (for example; “7.5ASTMColor.”)10.2 If the color of the sample is intermediate between thoseof two standard glasses, rep
27、ort that the sample is less than thedarker glass designation.As an example, report the designationof the darker glass preceded by the letter “L” (for example,“L7.5ASTM Color”) or with a “8 ASTM Color.”)10.2.1 If the color of the sample is less than the 0.5 glasscolor standard, report that the sample
28、 is less than the 0.5 glasscolor standard. As an example, report the designation as “L0.5ASTM Color” or “0.5 ASTM Color.”10.3 If the sample has been diluted in accordance with 7.1,report the color of the mixture followed by the abbreviation“Dil” (for example, “L7.5 Dil ASTM Color” or “7.5 DilASTM Co
29、lor”). See Note 3.NOTE 3For samples that are diluted in 10.3, it is permissible for thelaboratory to annotate the report in any suitable manner, provided that theinformation clearly conveys to the data recipient that the sample analyzedwas diluted.11. Precision and Bias311.1 PrecisionThe precision o
30、f this test method as ob-tained by statistical examination of interlaboratory test resultsis as follows:11.1.1 RepeatabilityThe difference between successivetest results obtained by the same operator with the sameapparatus under constant operating conditions on identical testmaterial would, in the l
31、ong run, in the normal and correctoperation of the test method, exceed the following value onlyin one case in twenty: 0.5 color units.11.1.2 Reproducibility The difference between two singleand independent test results obtained by different operatorsworking in different laboratories on identical tes
32、t material3Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR:D02-1234.FIG. 1 Standard Glass Sample JarD1500 122would, in the long run, in the normal and correct operation ofthe test method exceed the following value only in one cas
33、e intwenty: 1 color unit.11.2 BiasThe procedure in this test method has no biasbecause the value ofASTM Color is subjective and can only bedefined in terms of this test method.12. Keywords12.1 ASTM Color; color; petroleum productsANNEX(Mandatory Information)A1. DESCRIPTION OF COLORIMETER AND ASSOCIA
34、TED APPARATUSA1.1 ColorimeterUse an instrument that will illuminateand permit observation of the sample and any one of the colorstandards (or in the case of a three-field instrument, any two ofthe color standards) simultaneously, either by direct viewing orwith an optical eyepiece.A1.1.1 A two-field
35、 instrument must show two illuminatedareas of equal size and shape, one filled with light transmittedby color standard, the other with light transmitted by thesample. These illuminated areas shall be disposed symmetri-cally about a vertical median line and shall be separated in ahorizontal direction
36、 so that the horizontal separation of theclosest portions subtends the eye of the observer not less than2 nor more than 3.6.A1.1.2 Athree-field instrument shall show three illuminatedareas in the field of view. Two areas shall be filled with lighttransmitted by two different color standards, and the
37、se shall bedisposed symmetrically about the third area which shall befilled with light transmitted by the sample. The rectangulardimensions of each of the three areas shall be the same, and theleft- and right-hand corners of the full field of view shall berounded with radius not exceeding half the v
38、ertical dimension.The illuminated areas shall be separated in a horizontaldirection by vertical lines so that the closest portion of thesample area and any one of the color standards illuminatedareas subtends the eye of the observer not less than 0.3 normore than 0.6.A1.1.3 Each illuminated area in
39、the two-field instrumentshall cover a circle of diameter subtending at least 2.2 andmay be enlarged to any size provided that no two illuminatedpoints in the field of view are separated by a distancesubtending more than 10. In the case of the three-field directviewing instrument, the subtending angl
40、es become 2.6 and6.4, respectively.A1.1.4 The angle subtended by a line of length d, in a planeperpendicular to the line of sight, and separated from the eye ofthe observer by a distance D, is given in degrees by 57.3 d/D.The angle subtended by the image of this line, seen by viewingit through an ey
41、epiece of magnification M, is given in degreesby 57.3 Md/Di, where Diis the distance between the eye of theobserver and the plane of the image.A1.2 Artificial Daylight Source This may be a separateunit or an integral part of the colorimeter where the combinedsystem of a source lamp (A1.2.1), dayligh
42、t filter glass (A1.3),and flashed opal glass (A1.2.2) are capable of producingspectral characteristics similar to northern daylight (that is,color temperature of 6700 6 300 K) for use in the test.NOTE A1.1When electric current is not available, the colorimeter maybe designed to use diffused daylight
43、 provided that direct sunlight isavoided. Colored objects should be excluded from the immediate fore-ground when using diffused daylight.A1.2.1 Source Lamp Consisting of a lamp of color tem-perature of approximately 2750 K (or if a quartz halogen lampis used, approximately 2900 K). A source lamp pro
44、viding atranslucent or opaque diffuse background of 900 6 100 lxbrightness against which the color standards and samples areviewed has been found satisfactory to produce the necessaryspectral characteristics. The source lamp shall be designed sothat there is no extraneous light interfering with the
45、observa-tion.A1.2.2 Flashed Opal GlassThe background of illumi-nated opal glass shall be free from glare or shadows.A1.3 Filter An acceptable daylight filter, which has beenused in combination with the artificial daylight source andflashed opal glass to produce the spectral characteristics similarto
46、 northern daylight, is one where a spectrometric test indicatesa transmittance of radiant energy of not less than 0.60 at 410nm with a smooth curve down to a transmittance below 0.10 at700 nm without the pronounced bump that is characteristic ofexcess cobalt having an increased transmittance at 570
47、nmabove a straight line drawn between the points indicatingtransmittance at 540 and 590 nm, and also a transmittance bandabove 660 nm. The transmittance of an acceptable filter shallnot, at 570 nm, exceed by more than 0.03 that indicated by aTABLE A1.1 Filter CharacteristicsCharacteristicLamp Color
48、Temperature, K2750 3300T 0.107 to 0.160 0.075 to 0.125x 0.314 to 0.330 0.300 to 0.316y 0.337 to 0.341 0.325 to 0.329z 0.329 to 0.349 0.355 to 0.375D1500 123straight line drawn between the points indicating transmittanceat 540 and 590 nm, nor shall the transmittance for 700 nmexceed that for any shor
49、ter wavelength (such as 660 nm) bymore than 0.03.A1.3.1 An acceptable daylight filter shall also possess suchcharacteristics that the chromaticity coordinates, x, y, and z,and luminous transmittance, T, when calculated from thespectral transmittance data using the 1931 CIE StandardIlluminant A,4shall be as shown in Table A1.1.A1.4 Glass Color StandardsUse color standards as speci-fied in Table A1.2. The standards shall be mounted in such away that they may be conveniently manipulated. The width ofthe glass color standards shall not be less than 14 mm
