ASTM D5200-2003(2008)e1 Standard Test Method for Determination of Weight Percent Volatile Content of Solvent-Borne Paints in Aerosol Cans《测定气溶胶瓶中溶剂型漆挥发物质重量百分比的标准试验方法》.pdf

1、Designation: D 5200 03 (Reapproved 2008)1Standard Test Method forDetermination of Weight Percent Volatile Content of Solvent-Borne Paints in Aerosol Cans1This standard is issued under the fixed designation D 5200; the number immediately following the designation indicates the year oforiginal adoptio

2、n 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.1NOTEThe units statement in subsection 1.2 was corrected editorially in November 2008.1

3、. Scope1.1 This test method is for the determination of the weightpercent volatile organic compounds of solvent-borne paints inaerosol cans. It offers a unique way to obtain paint specimensfrom aerosol cans.1.2 The values stated in SI units are to be regarded asstandard. No other units of measuremen

4、t are included in thisstandard.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 limitatio

5、ns prior to use. A specific hazardstatement is given in 6.7.2. Referenced Documents2.1 ASTM Standards:2E 145 Specification for Gravity-Convection and Forced-Ventilation OvensE 180 Practice for Determining the Precision of ASTMMethods for Analysis and Testing of Industrial and Spe-cialty Chemicals2.2

6、 Other Standard:Method 35 Determination of Percent Volatile Organic Com-pounds (VOC) in Solvent Based Aerosol Paints33. Summary of Test Method3.1 Adesignated quantity from an aerosol coating is sprayedinto an adapter glass tube assembly and heated in an oven at110 6 5C for 60 min. The percent volati

7、le is calculated fromthe loss in weight.4. Significance and Use4.1 This test method is the procedure of choice for deter-mining the volatile content in aerosol coatings under specifiedtest conditions modeled after Method 35.3The inverse value,nonvolatile, is used to determine the weight percent soli

8、dscontent. This information is useful to the paint producer, user,and to environmental interests for determining the grams ofvolatile organic compounds per gram of solids emitted fromaerosol cans.5. Apparatus5.1 Adapter Glass Tube Assembly,(Fig. 1).5.1.1 Sample Adapter Tube, straight connecting with

9、 35/25spherical joints. Loosely fill with glass wool and preconditionfor 30 min in an oven at 110 6 5C and store in a dessicatorprior to use.4,55.1.2 Charcoal Adapter Tube, straight connecting with35/25 spherical joints. Fill with activated charcoal and plugboth ends with glass wool. This tube is us

10、ed to prevent thesolvent vapors from contaminating the vacuum pump.5,65.1.3 Adapters, connecting hose with 35/25 socket joints.5,75.1.4 Adapter,5,8connecting hose with 35/25 ball joint.5.1.5 Clamps, pinch type, with screw-locking device.5,95.1.6 Glass Wool, medium-fine silk.5.1.7 Activated Charcoal,

11、 coconut, 8 to 12 mesh.5.1.8 Tygon Tubing.5.1.9 Iron Stands.5.1.10 Utility Clamps.1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings, Materials, and Applications and is the direct responsibility ofSubcommittee D01.21 on Chemical Analysis of Paints and Pain

12、t Materials.Current edition approved Nov. 1, 2008. Published November 2008. Originallyapproved in 1991. Last previous edition approved in 2003 as D 5200 03.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of AST

13、MStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Bay Area Air Quality Management District, (BAAQMD) Manual of Proce-dures, Vol III, 939 Ellis St., San Francisco, CA 94109.4The sole source of supply of the adapter tube, No. 5035-35 known to thecommittee

14、at this time is Ace Glass Inc., P.O. Box 688, 1430 Northwest Blvd.,Vineland, NJ 08360.5If you are aware of alternative suppliers, please provide this information toASTM International Headquarters. Your comments will receive careful consider-ation at a meeting of the responsible technical committee,1

15、which you may attend.6The sole source of supply of the charcoal adapter tube, No. 5035-3 known tothe committee at this time is Ace Glass Inc.7The sole source of supply of the adapters (socket joints) No. 5217-35 known tothe committee at this time is Ace Glass Inc.8The sole source of supply of the ad

16、apter (ball joint) No. 5216-35 known to thecommittee at this time is Ace Glass Inc.9The sole source of supply of the clamps, No. 7669-14 known to the committeeat this time is Ace Glass Inc.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United Sta

17、tes.5.2 Vacuum Pump.5.3 Forced Draft Oven, Type II A or Type II B as specifiedin Specification E 145.5.4 Actuators (Valves), with extension tubes.5.5 Top-Loading Balance, capable of weighing to 0.01 g.5.6 Shaker, similar to the Eberbach shaker in Fig. 2.6. Procedure6.1 Mix the aerosol can thoroughly

18、 using a shaker, similarto the Eberbach shaker in Fig. 2, for 15 min at the low-speedsetting. It is essential that the samples be well mixed to obtainvalid results.6.2 Weigh accurately to 0.01 g, a preconditioned sampleadapter tube. Use a pair of gloves at all times when handlingthe adapter glass tu

19、be.6.3 Remove the cap and actuator from the mixed can.Replace the actuator with one having an extension tube.6.4 Test actuator and extension tube fit by spraying somecontents out for about 5 s. This step also clears the dip tube incase a separation has occurred. If a leak is observed, replacewith a

20、better fitting actuator or extension tube.6.5 Weigh the aerosol can with the actuator to the nearest0.01 g. Spray 3 to5gofaerosol into the adapter tube assembly,spreading out the coating by moving the extension tube aroundthe wall of the adapter tube. The spraying is done with thevacuum on.6.6 Obtai

21、n the specimen weight by difference by weighingthe aerosol can again to 0.01 g after spraying out the specimen.6.7 Place the sample adapter tube in the drying oven for 60min at 110 6 5C. (WarningProvide adequate ventilation,consistent with accepted laboratory practice, to prevent solventvapors from

22、accumulating to a dangerous level.)6.8 Remove the adapter tubes from the oven, place imme-diately in a dessicator, cool to ambient temperature, and weighto 0.01 g.7. Calculations7.1 Calculate the weight percent nonvolatile content (NV),in the aerosol can as follows:NV,%5 W2/W1! 3 100 (1)where:W1= we

23、ight of aerosol can before spraying sample minusweight of aerosol can after spraying sample, g, andW2= weight of sample adapter tube with solids minusweight of sample adapter tube, g.7.2 The weight percent organic volatiles (WO), in theaerosol can may be calculated by the difference as follows:WO,%5

24、 100 2 NV (2)where grams of organic volatiles/grams of solid equalWO/NV.8. Precision and Bias8.1 PrecisionEstimates are based on an interlaboratorystudy in which 1 operator in each of 3 laboratories analyzed induplicate on two different days 3 samples of solvent-borneaerosol coatings containing 63.0

25、4 to 77.53 % organic volatiles.The coatings were commercially supplied. The results wereanalyzed statistically in accordance with Practice E 180. Thewithin laboratory coefficient of variation was found to be0.51 % relative at 9 df and the between laboratory coefficient ofvariation was 1.04 % relativ

26、e at 6 df. Based on these coeffi-cients, the following criteria should be used for judging theacceptability of results at the 95 % confidence level:8.1.1 RepeatabilityTwo results, each the mean of dupli-cate determinations obtained by the same operator on differentdays, should be considered suspect

27、if they differ by more than1.62 % relative.8.1.2 ReproducibilityTwo results, each the mean of dupli-cate determinations obtained by operators in different labora-tories should be considered suspect if they differ by more than3.59 %.8.2 BiasBias cannot be determined because there are noaccepted stand

28、ards for volatile content of solvent-borne contentof paints in aerosol cans.FIG. 1 Adapter Glass Tube AssemblyFIG. 2 Aerosol Can on Eberbach ShakerD 5200 03 (2008)129. Keywords9.1 aerosols; solvent-borne paints; volatile contentASTM International takes no position respecting the validity of any pate

29、nt rights asserted in connection with any item mentionedin this standard. 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

30、at any time by the responsible technical committee and must be reviewed 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 comme

31、nts will receive careful consideration at a meeting of theresponsible 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

32、 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).D 5200 03 (2008)13