1、Designation: D2232 14Standard Test Method forEvaporating Residue of Naphthalene1This standard is issued under the fixed designation D2232; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in paren
2、theses 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 evapo-ration residue of naphthalene.1.2 This test method has been found applicable to determin-ing r
3、esidue in the range of 0.3 and 1.5 wt %.1.3 In determining the conformance of the test results usingthis method to applicable specifications, results shall berounded off in accordance with the rounding-off method ofPractice E29.1.4 The values stated in SI units are to be regarded asstandard. No othe
4、r units of measurement are included in thisstandard.1.5 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
5、 regulatory limitations prior to use. For specific hazardstatements, see Section 7 and 8.1.2. Referenced Documents2.1 ASTM Standards:2D3438 Practice for Sampling and Handling Naphthalene,Maleic Anhydride, and Phthalic AnhydrideD4790 Terminology of Aromatic Hydrocarbons and RelatedChemicalsD6809 Guid
6、e for Quality Control and Quality AssuranceProcedures for Aromatic Hydrocarbons and Related Ma-terialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE145 Specification for Gravity-Convection and Forced-Ventilation OvensE691 Practice for Conducting a
7、n Interlaboratory Study toDetermine the Precision of a Test Method2.2 Other Document:OSHA Regulations, 29 CFR paragraphs 1910.1000 and1910.120033. Terminology3.1 See Terminology D4790 for the definition of terms usedin this test method.4. Summary of Test Method4.1 A weighed quantity of naphthalene i
8、s heated in a tareddish for3hat105C in a forced-draft oven and the residue isweighed.5. Significance and Use5.1 Evaporation residue is an empirical measure of nonvola-tile impurities in naphthalene. This test method is suitable forsetting specifications and for use as an internal quality controltool
9、.6. Apparatus6.1 Evaporating Dishes, porcelain, shallow form or alumi-num weighing dishes, low form, fluted, 60 mm diameter, 15mm high, 42 mL capacity.6.2 Drying Oven, forced-ventilation, conforming to Speci-fication E145 Type II, Grade A or B.7. Hazards7.1 Consult current OSHA regulations, supplier
10、s SafetyData Sheets and local regulations for all materials used in thistest method.8. Sampling and Handling8.1 Refer to Practice D3438 for proper sampling and han-dling of this product analyzed by this test method. (CautionSampling should follow safe rules in order to adhere to allsafety precaution
11、s as outlined in the latest OSHA regulations.)1This test method is under the jurisdiction of ASTM Committee D16 onAromatic Hydrocarbons and Related Chemicals and is the direct responsibility ofSubcommittee D16.07 on Styrene, Ethylbenzene and C9 and C10 AromaticHydrocarbons.Current edition approved J
12、uly 1, 2014. Published August 2014. Originallyapproved in 1967. Last previous edition approved in 1990 as D2232 81 (1990)which was withdrawnApril 1995 and reinstated in July 2014. DOI: 10.1520/D2232-14.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Serv
13、ice at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from U.S. Government Printing Office Superintendent of Documents,732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http:/www.access.gpo.
14、gov.*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 States19. Procedure9.1 Place the evaporating dish in the drying oven and heat at105 6 5C for at least 30 min. Remove from th
15、e oven and coolin a desiccator. Weigh the cooled dish to the nearest 0.001 g.9.2 Transfer to the tared dish 9.5 to 10.5 g weighed to thenearest 0.001 g of the thoroughly mixed naphthalene specimen.(CautionSpecimens for this determination should behandled in the solid state.)9.3 Place the dish and co
16、ntents in the forced draft oven.Maintain at 105 6 5C for 180 6 5 min. (CautionSpecimens should be placed as near the center of the oven aspossible (both horizontally and vertically). The oven shouldnot contain other volatile materials during this determination,nor should it contain objects large eno
17、ugh to change the flowpattern of the circulating air. The draft control on the ovenshould be fully open.)9.4 Remove the dish from the oven, cool in a desiccator, andweigh to the nearest 0.001 g.10. Calculation10.1 Calculate the evaporation residue content of thespecimen, E, as follows:E 5 B 2 A! C#
18、3 100 (1)where:E = evaporation residue, wt %,B = weight of evaporating dish and residue, g,A = tare weight of evaporating dish, g, andC = weight of specimen used, g.11. Precision and Bias411.1 An ILS was conducted which included six laboratoriesanalyzing four samples three times. Practice E691 was f
19、ol-lowed for the design and analysis of the data. The details aregiven in ASTM Research Report No. RR:D16-1051.11.2 Repeatability:11.2.1 Results should not be suspect unless they differ bymore than shown in Table 1. Results differing by less than “r”have a 95 % probability of being correct.11.3 Repr
20、oducibility:11.3.1 Results submitted by two laboratories should not beconsidered suspect unless they differ by more than shown inTable 1. Results differing by less than “R”havea95%probability of being correct.11.4 Bias:11.4.1 Since there is no accepted reference material suitablefor determining the
21、bias in this test method, bias has not beendetermined.12. Quality Guidelines12.1 Laboratories shall have a quality control system inplace.12.1.1 Confirm the performance of the test instrument ortest method by analyzing a quality control sample followingthe guidelines of standard statistical quality
22、control practices.12.1.2 A quality control sample is a stable material isolatedfrom the production process and representative of the samplebeing analyzed.12.1.3 When QA/QC protocols are already established inthe testing facility, these protocols are acceptable when theyconfirm the validity of test r
23、esults.12.1.4 When there are no QA/QC protocols established inthe testing facility, use the guidelines described in GuideD6809 or similar statistical control practices.13. Keywords13.1 coal tar; naphthalene; petroleum; residueSUMMARY OF CHANGESCommittee D16 has identified the location of selected ch
24、anges to this standard since the last issue(D223281(1990) that may impact the use of this standard. (Approved July 1, 2014.)(1) Method was withdrawn in 1995 and was still in use in 1995and is being updated to meet D16 editorial guidelines.(2) Changes included updating footnotes, adding QualityGuidel
25、ines, keywords and mandatory statements at the end ofthe method.4Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR:D16-1051. ContactASTM CustomerService at serviceastm.org.TABLE 1 Evaporation Residue (wt. %)MaterialAverageAXRepeata
26、bilityLimitrReproducibilityLimitRA 0.07 0.09 0.09B 0.26 0.04 0.11C 0.35 0.14 0.34D 1.48 0.27 1.36AThe average of the laboratories calculated averages.D2232 142ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this stand
27、ard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be review
28、ed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible
29、 technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Cons
30、hohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 143
