ASTM D5200-2003 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 03Standard 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 adoption or, in the case o

2、f revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method is for the determination of the weightpercent volatile organic compounds of

3、solvent-borne paints inaerosol cans. It offers a unique way to obtain paint specimensfrom aerosol cans.1.2 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 h

4、ealth practices and determine the applica-bility of regulatory limitations prior to use. A specific hazardstatement is given in Note 1.2. Referenced Documents2.1 ASTM Standards:E 145 Specification for Gravity-Convection and Forced-Ventilation Ovens2E 180 Practice for Determining the Precision of AST

5、MMethods for Analysis and Testing of Industrial and Spe-cialty Chemicals32.2 Other Standard:Method 35 Determination of Percent Volatile Organic Com-pounds (VOC) in Solvent Based Aerosol Paints43. Summary of Test Method3.1 A designated quantity from an aerosol coating is sprayedinto an adapter glass

6、tube assembly and heated in an oven at110 6 5C for 60 min. The percent volatile 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

7、4. The inverse value,nonvolatile, is used to determine the weight percent solidscontent. 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 Gl

8、ass Tube Assembly, (Fig. 1).5.1.1 Sample Adapter Tube, straight connecting with 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.5,61This test method is under the jurisdiction of ASTM Committee D01 on Paintand

9、 Related Coatings, Materials, and Applications and is the direct responsibility ofSubcommittee D01.21 on Chemical Analysis of Paints and Paint Materials.Current edition approved Jan. 10, 2003. Published March 2003. Originallyapproved in 1991. Last previous edition approved in 1997 as D 5200 92 (1997

10、)e1.2Annual Book of ASTM Standards, Vol 14.04.3Annual Book of ASTM Standards, Vol 15.05.4Bay Area Air Quality Management District, (BAAQMD) Manual of Proce-dures, Vol III, 939 Ellis St., San Francisco, CA 94109.5The sole source of supply of the adapter tube, No. 5035-35 known to thecommittee at this

11、 time is Ace Glass Inc., P.O. Box 688, 1430 Northwest Blvd.,Vineland, NJ 08360.FIG. 1 Adapter Glass Tube Assembly1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.1.2 Charcoal Adapter Tube, straight connecting with35/25 spherical joi

12、nts. Fill with activated charcoal and plugboth ends with glass wool. This tube is used to prevent thesolvent vapors from contaminating the vacuum pump.6,75.1.3 Adapters, connecting hose with 35/25 socket joints.6,85.1.4 Adapter,6,9connecting hose with 35/25 ball joint.5.1.5 Clamps, pinch type, with

13、screw-locking device.6,105.1.6 Glass Wool, medium-fine silk.5.1.7 Activated Charcoal, coconut, 8 to 12 mesh.5.1.8 Tygon Tubing.5.1.9 Iron Stands.5.1.10 Utility Clamps.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 extensi

14、on 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 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 mi

15、xed 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 tube.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 extens

16、ion 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 better fitting actuator or extension tube.6.5 Weigh the aerosol can with the actuator to the nearest0.01 g. Spray 3 to5gofaerosol into th

17、e 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 Obtain the specimen weight by difference by weighingthe aerosol can again to 0.01 g after spraying out the specimen.6.7 Place the sample adapt

18、er tube in the drying oven for 60min at 110 6 5C.NOTE 1Warning: Provide adequate ventilation, consistent with ac-cepted laboratory practice, to prevent solvent vapors from accumulating toa dangerous level.6.8 Remove the adapter tubes from the oven, place imme-diately in a dessicator, cool to ambient

19、 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= weight of aerosol can before spraying sample minusweight of aerosol can after spraying sample, g, andW2= weight of sample adapter tu

20、be 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,%5 100 2 NV (2)where grams of organic volatiles/grams of solid equalWO/NV.8. Precision and Bias8.1 PrecisionEstimates are based on a

21、n interlaboratorystudy in which 1 operator in each of 3 laboratories analyzed induplicate on two different days 3 samples of solvent-borneaerosol coatings containing 63.04 to 77.53 % organic volatiles.The coatings were commercially supplied. The results wereanalyzed statistically in accordance with

22、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 % relative at 6 df. Based on these coeffi-cients, the following criteria should be used for judging theacceptability of results at the 95 %

23、 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 if they differ by more than1.62 % relative.8.1.2 ReproducibilityTwo results, each the mean of dupli-cate determinations obtained b

24、y 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 standards for volatile content of solvent-borne contentof paints in aerosol cans.9. Keywords9.1 aerosols; solvent-borne paints; volatil

25、e content6If you are aware of alternative suppliers, please provide this information toASTM Headquarters. Your comments will receive careful consideration at a meetingof the responsible technical committee,1which you may attend.7The sole source of supply of the charcoal adapter tube, No. 5035-3 know

26、n tothe committee at this time is Ace Glass Inc.8The sole source of supply of the adapters (socket joints) No. 5217-35 known tothe committee at this time is Ace Glass Inc.9The sole source of supply of the adapter (ball joint) No. 5216-35 known to thecommittee at this time is Ace Glass Inc.10The sole

27、 source of supply of the clamps, No. 7669-14 known to the committeeat this time is Ace Glass Inc.FIG. 2 Aerosol Can on Eberbach ShakerD5200032ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of thi

28、s 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 reviewed every five yea

29、rs 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 technical commit

30、tee, 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 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).D5200033