1、Designation: F 34 02 (Reapproved 2007)Standard Practice forConstruction of Test Cell for Liquid Extraction of FlexibleBarrier Materials1This standard is issued under the fixed designation F 34; the number immediately following the designation indicates the year of originaladoption or, in the case of
2、 revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscriptepsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers the construction of test cells whichmay be used for the extraction of com
3、ponents from flexiblebarrier materials by suitable extracting liquids, including foodsand food simulating solvents.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
4、safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 1193 Specification for Reagent Water2.2 AOAC International Methods of Analysis:Extractives from Flexible Barrier Materials32.3 Code of Federal Regulations:
5、Title 21, Sections 176.17043. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 flexible for purpose of this practice, a term applyingonly to those flexible materials which can be inserted in the testcell without affecting their barrier properties.4. Significance and Use4.1 Knowled
6、ge of extractives from flexible barrier materialsmay serve many useful purposes. A test cell constructed asdescribed in this practice may be used for obtaining such data.Another test cell has been found equivalent to the onedescribed in this practice. See the appendix for the source ofthe alternate
7、cell.5. Reagents and Materials5.1 Purity of ReagentsReagent grade chemicals shall beused in all tests. Unless otherwise indicated, it is intended thatall reagents shall conform to the specifications of the Commit-tee on Analytical Reagents of the American Chemical Society,where such specifications a
8、re available.5Other grades may beused, provided it is first ascertained that the reagent is ofsufficiently high purity to permit its use without lessening theaccuracy of the determination.5.2 Purity of WaterUnless otherwise indicated, referencesto water shall be understood to mean referee reagent gr
9、adecorresponding to Specification D 1193.5.3 n-Heptane, boiling point specified as 208F (97C),freshly distilled.6. Procedure6.1 Construction of Test Cell (Fig. 1, Fig. 2)Assemble asfollows:6.1.1 Two 8 by 1138 by18-in. (203 by 289 by 3.2-mm) No.316 stainless steel plates, degreased.6.1.2 One14 by 112
10、-in. (6.4 by 38-mm) U-shaped virginTFE-fluorocarbon gasket, grooved on both sides as shown.6.1.3 Twelve14 by 1-in. (6.4 by 25.4-mm) stainless steelbolts with wing nuts.6.1.4 One14 by 1 by 8-in. (6.4 by 25.4 by 203-mm)TFE-fluorocarbon gasket plug tapered to provide a tight fit.6.1.5 Six18 by38 by 3-i
11、n. (6.4 by 9.5 by 76-mm) plates.NOTE 1The use of stainless steel washers on the outside of each plate(6.1.1) may prevent the cells from leaking.6.2 Pre-Use Conditioning of Test Cell:1This practice is under the jurisdiction of ASTM Committee F02 on FlexibleBarrier Packaging and is the direct responsi
12、bility of Subcommittee F02.15 onChemical/ Safety Properties.Current edition approved April 1, 2007. Published May 2007. Originallyapproved in 1963. Last previous edition approved in 2002 as F 34 02.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service
13、at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3This method is available through the Association of Official AnalyticalChemists, International, 481 North Frederick Ave., Suite 500, Gaithersburg, MD208772417.4Av
14、ailable from U.S. Government Printing Office Superintendent of Documents,732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http:/www.access.gpo.gov.5Reagent Chemicals, American Chemical Society Specifications , AmericanChemical Society, Washington, DC. For suggestions on the testing of r
15、eagents notlisted by the American Chemical Society, see Analar Standards for LaboratoryChemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeiaand National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,MD.1Copyright ASTM International, 100 Barr Harbor Drive, PO
16、 Box C700, West Conshohocken, PA 19428-2959, United States.6.2.1 Wash stainless steel plates and TFE-fluorocarbon gas-kets in aqueous surfactant solution. Rinse with reagent waterand dry at 122F (50C). Wash with n-heptane and redistilledacetone.6.2.2 For new TFE-fluorocarbon gaskets, immerse inn-hep
17、tane overnight. Rinse gaskets with fresh n-heptane. Drygaskets at 122F (50C).6.3 Use of Test Cell:6.3.1 Place one stainless steel plate of the cell on a flatsurface with bolts protruding up through the holes in the plate.Place a prepunched (Note 2) specimen (side to contact liquidup) on the plate wi
18、th one edge of the specimen aligned with thebottom of the plate, two edges aligned with the sides of theplate, and the bolts passing through the prepunched holes.Place a TFE-fluorocarbon gasket on the specimen with theouter edges of the gasket aligned with the cell bottom andsides. If desired, place
19、 a second prepunched specimen (side tocontact liquid down) on top of the gasket. If only one specimensheet is used for the test, place an inert barrier sheet such asTFE-fluorocarbon or clean foil in place of the second speci-men. Place a second stainless steel plate on top of the assembly.Place wing
20、 nuts on the bolts and tighten.NOTE 2Use the cell plate as a template and any suitable sharpinstrument to prepunch the specimen through the bolt holes in the plate.6.3.2 Preheat the assembly (including the TFE-fluorocarbongasket plug) to the test temperature and retighten the nuts sothat the assembl
21、y is liquid-tight. The assembly is ready to use.7. Keywords7.1 flexible barrier materials; food simulating solvents; testcellsSI Equivalentsin. mm in. mm in. mm116 1.658 15.9 214 5718 3.234 19 3 7614 6.4 1 25.4 8 203932 7112 38 1138 28938 9.5FIG. 1 Test Cell AssemblyF 34 02 (2007)2APPENDIX(Nonmandat
22、ory Information)X1. AN ALTERNATE TEST CELL FOR LIQUID EXTRACTIONS OF FLEXIBLE BARRIER MATERIALSX1.1 An alternate test cell has been found to be useful forliquid extractions of flexible barrier materials.6X1.2 The test cell requires less solvent than the original celldescribed in this practice, and m
23、aintains an adequate testsurface area for extractions. Food and Drug Administration(FDA) laboratories have successfully used this cell to perform6The test cell is a compression migration cell originally designed at DowChemical Co. The sole source of supply of the test cell known to the committee att
24、his time is Kayeness, Inc., and can be purchased from 115 Thousand Oaks Blvd.,Suite 101, P.O. Box 709, Morgantown, PA 19543, as Item No. D9030. If you areaware of alternative suppliers, please provide this information to ASTM Interna-tional Headquarters. Your comments will receive careful considerat
25、ion at a meetingof the responsible technical committee1, which you may attend.SI Equivalentsin. mm in. mm in. mm18 3.2 1 25.4 714 18414 6.4 214 57 814 21038 9.5 578 149 1212 31758 15.9FIG. 2 Rack for Holding Test CellsF 34 02 (2007)3extraction studies of PETE films with both water and Miglyol8127(a
26、fractionated coconut oil) over a temperature range from60 to 120C.8, 9X1.3 Reference is made to this cell in the June 1995Recommendations for Chemistry Data for Indirect Food Ad-ditives Petitions.10ASTM International takes no position respecting the validity of any patent rights asserted in connecti
27、on 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 at any time by the responsible
28、 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 comments will receive careful consi
29、deration 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 by ASTM International, 100 Ba
30、rr 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 websi
31、te(www.astm.org).7The sole source of supply of Miglyol 812, a product of Dynamit NobelChemicals, known to the committee at this time is HULS America, Inc., 80Centennial Ave., P.O. Box 456, Piscataway, NJ 088550456. If you are aware ofalternative suppliers, please provide this information to ASTM Int
32、ernationalHeadquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee1, which you may attend.8Begley, Timothy H., and Hollifield, Henry C., “Food Packaging Made fromRecycled Polymers: Functional Barrier Considerations,” Chapter 36, Plastics,Rubbe
33、r, and Paper Recycling: A Pragmatic Approach. ACS Symposium Series 609,1995, pp. 445475.9Piringer, O., Begley, T.H., et al.,“ Migration from Food Packaging Containinga Functional Barrier: Mathematical and Experimental Evaluation,” J. Agr. and FoodChem., Vol 46, No. 4, 1998, pp. 15321538.10Food and Drug Administration, Center for Food Safety and Applied Nutrition,Office of Premarket Approval, HFS-200 C Street, S.W., Washington, DC 20204.F 34 02 (2007)4
