1、Designation: D2232 14 (Reapproved 2018)Standard 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.
2、 A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the determination of the evapo-ration residue of naphthalene.1.2 This test method has been found applicable
3、to determin-ing residue 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 as
4、standard. No other 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, health, and environmental practices an
5、d deter-mine the applicability of regulatory limitations prior to use.For specific hazard statements, see Section 7, 8.1, 9.2, and 9.3.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles
6、 for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D3438 Practice for Sampling and Handling Naphthalene,Maleic Anhydride, and Phthalic AnhydrideD4790
7、Terminology of Aromatic Hydrocarbons and RelatedChemicalsD6809 Guide 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-Co
8、nvection and Forced-Ventilation OvensE691 Practice for Conducting an 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 meth
9、od.4. Summary of Test Method4.1 A weighed quantity of naphthalene is 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 forse
10、tting specifications and for use as an internal quality controltool.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, Gr
11、ade A or B.7. Hazards7.1 Consult current OSHA regulations, suppliers SafetyData Sheets and local regulations for all materials used in thistest method.1This test method is under the jurisdiction of ASTM Committee D16 onAromatic, Industrial, Specialty and Related Chemicals and is the direct responsi-
12、bility of Subcommittee D16.07 on Styrene, Ethylbenzene and C9 and C10 AromaticHydrocarbons.Current edition approved June 1, 2018. Published June 2018. Originallyapproved in 1967. Last previous edition approved in 2014 as D2232 14. DOI:10.1520/D2232-14R18.2For referenced ASTM standards, visit the AST
13、M website, www.astm.org, orcontact ASTM Customer Service 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 S
14、top: SDE, Washington, DC 20401, http:/www.access.gpo.gov.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established
15、in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.18. Sampling and Handling8.1 Refer to Practice D3438 for proper sampling and han-dling of this product analyzed b
16、y this test method. (CautionSampling should follow safe rules in order to adhere to allsafety precautions as outlined in the latest OSHA regulations.)9. Procedure9.1 Place the evaporating dish in the drying oven and heat at105 6 5C for at least 30 min. Remove from the oven and coolin a desiccator. W
17、eigh 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 contents in the forced draft oven.M
18、aintain 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 enough to change the flowpattern of
19、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# 3 100 (1)where:E = evaporation re
20、sidue, 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 fol-lowed for the design and analy
21、sis 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 Reproducibility:11.3.1 Results submit
22、ted 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 bias in this test method, bias ha
23、s 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 control practices.12.1.2 A qualit
24、y 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 results.12.1.4 When there are no Q
25、A/QC protocols established inthe testing facility, use the guidelines described in GuideD6809 or similar statistical control practices.13. Keywords13.1 coal tar; naphthalene; petroleum; residue4Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Resear
26、ch Report RR:D16-1051. ContactASTM CustomerService at serviceastm.org.TABLE 1 Evaporation Residue (wt. %)MaterialAverageAXRepeatabilityLimitrReproducibilityLimitRA 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 14 (2018)2ASTM
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30、 Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, 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:/ 14 (2018)3
