1、Designation: D2380 04 (Reapproved 2011)Standard Test Method forMethanol Content of Formaldehyde Solutions1This standard is issued under the fixed designation D2380; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last r
2、evision. 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 provides for the calculation of themethanol content of commercially available 37 % formalde-hyde solutions
3、 and is based on the relationship of specificgravity to formaldehyde and methanol content.2Separateequations are given for three ranges of methanol: 0 to 2 %, 6 to8 %, and 12 to 15 %.1.2 For purposes of determining conformance of an ob-served or a calculated value using this test method to relevants
4、pecifications, test result(s) shall be rounded off “to the nearestunit” in the last right-hand digit used in expressing thespecification limit, in accordance with the rounding-off methodof Practice E29.1.3 The values stated in SI units are to be regarded asstandard. No other units of measurement are
5、 included in thisstandard.1.4 For hazard information and guidance, see the suppliersMaterial Safety Data Sheet.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 safe
6、ty and health practices and determine the applica-bility of regulatory limitations prior to use. Specific hazardstatements are given in Section 4.2. Referenced Documents2.1 ASTM Standards:3D268 Guide for Sampling and Testing Volatile Solvents andChemical Intermediates for Use in Paint and RelatedCoa
7、tings and MaterialD2194 Test Method for Concentration of FormaldehydeSolutionsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications3. Significance and Use3.1 This test method provides a measurement of methanolcontent of formaldehyde solutions. The results
8、 of these mea-surements can be used for specification acceptance.3.2 This test method is applicable to 37 % formaldehydesolutions containing 0 to 2 %, 6 to 8 %, or 12 to 15 %methanol.4. Hazards4.1 Formaldehyde and formaldehyde solutions are hazard-ous. Minimize exposure and contact to avoid acute ef
9、fects andpossible sensitizing. Consult the suppliers Material SafetyData Sheet for specific hazard information.5. Procedure5.1 Determine the apparent specific gravity of the materialby a method that is accurate to the fourth decimal place, thetemperature of both the specimen and the water being 25C.
10、See Guide D268.5.2 Determine the formaldehyde content of the material inaccordance with Test Method D2194.6. Calculation6.1 Calculate the methanol content as follows using theappropriate equation for the expected methanol range:6.1.1 0 to 2 % Methanol:Methanol, wt % 5 1.0017 1 0.003F 2 D!/0.00253 (1
11、)6.1.2 6 to 8 % Methanol:Methanol, wt % 5 1.0015 1 0.003F 2 D!/0.00250 (2)6.1.3 12 to 15 % Methanol:Methanol, wt % 5 1.0210 1 0.0025F 2 D!/0.00257 (3)where:F = formaldehyde content, weight %, andD = specific gravity at 25/25C.1This test method is under the jurisdiction of ASTM Committee D01 on Paint
12、and Related Coatings, Materials, and Applications and is the direct responsibility ofSubcommittee D01.35 on Solvents, Plasticizers, and Chemical Intermediates.Current edition approved Feb. 1, 2011. Published February 2011. Originallyapproved in 1965. Last previous edition approved in 2004 as D2380 0
13、4. DOI:10.1520/D2380-04R11.2Walker, J. F., Formaldehyde, 3rd edition, 1964, pp. 8691.3For 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 Summary
14、page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.NOTE 1The numerical factors were calculated from the slope of themethanol curve of a nomograph
15、relating specific gravity at 25/25C tomethanol-formaldehyde content.7. Report7.1 Report the methanol content to the nearest 0.1 %.8. Precision and Bias8.1 In an interlaboratory study of this test method, thewithin-laboratory standard deviation was found to be 0.10 %absolute with 28 degrees of freedo
16、m and the between-laboratories standard deviation 0.16 % absolute with 12 de-grees of freedom based on these standard deviations, thefollowing criteria should be used for judging the acceptabilityof results at the 95 % confidence level:8.1.1 RepeatabilityTwo results, each the mean of dupli-cates, ob
17、tained by the same analyst on different days should beconsidered suspect if they differ by more than 0.3 % absolute.8.1.2 ReproducibilityTwo results, each the mean of dupli-cates, obtained by analysts in different laboratories, should beconsidered suspect if they differ by more than 0.5 % absolute.N
18、OTE 2The above precision estimates are based on two interlabora-tory studies involving five and nine laboratories respectively, using twodifferent samples in each case, with a single analyst performing duplicateruns on each of two days. The methanol levels studied were 1.5, 6.5, and14.3 %.8.2 BiasBi
19、as of this test method has not been determinedbecause primary standards do not exist.9. Keywords9.1 formaldehyde; methanolSUMMARY OF CHANGESSubcommittee D01.35 has identified the location of selected changes to this standard since the last issue(D2380 99) that may impact the use of this standard.(1)
20、Added reference to Practice E29 in 1.2 of the Scope section.(2) Added reference to Practice E29 in 2.1 of ReferencedDocuments.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are e
21、xpressly 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 reviewed every five years andif not rev
22、ised, 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 technical committee, which you m
23、ay 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 Conshohocken, PA 19428-2959,United St
24、ates. 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 ASTM website (www.astm.org/COPYRIGHT/).D2380 04 (2011)2
