1、Designation:F134908(Reapproved 2014)Standard Test Method forNonvolatile Ultraviolet(UV)Absorbing Extractables fromMicrowave Susceptors1This standard is issued under the fixed designation F1349;the number immediately following the designation indicates the year oforiginal adoption or,in the case of r
2、evision,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.1.Scope1.1 This test method covers the determination of nonpolarand relatively polar ultraviolet(UV)absorbing comp
3、onentsthat may migrate from microwave susceptor packaging intofood simulants,such as corn oil and Miglyol 812.1.2 This test method has been collaboratively studied usingbilaminate susceptors constructed of paperboard,adhesive,anda layer of polyethylene terephthalate polymer(PETE)suscep-tor.Adhesive
4、and PETE related compounds were quantitatedusing this test method.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is th
5、eresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.Specific warningstatements are given in 4.3.2.3.2.Referenced Documents2.1 ASTM Standards:2F874 Test Method for Temperature Measur
6、ement and Pro-filing for Microwave SusceptorsF1317 Test Method for Calibration of Microwave Ovens3.Apparatus and Reagents3.1 Microwave Oven,700 6 35 W,calibrated.Refer to TestMethod F1317.3.2 High-Pressure Liquid Chromatograph(HPLC),consist-ing of:3.2.1 Pump,capable of 1.5 mL/min with flow precision
7、62%.3.2.2 Injector,loop-type,equipped with 20-L loop.3.2.3 Guard Column,C8,5 m.3.2.4 Analytical Column,C8,5 m,250 by 4.6 mm.3.2.5 Detector-UV Absorbance,set for 254 nm.Adjustsensitivity to give a 70 to 100%of full scale peak for the 5-ppm dimethylterephthalate DMT standard.3.2.6 Gradient Program,4 t
8、o 60%Mobile Phase B in 8min;60 to 70%B in 9 min;70 to 100%B in 7 min;100%Bfor 11 min;100 to 4%B in 5 min;4%B for minimum of 5min.Where Mobile Phase A(v/v)is 85+15+0.25%water:acetonitrile:acetic acid,and Mobile Phase B(v/v)is15+85%water:acetonitrile.3.2.7 Peak Area Integration SystemInitialize data a
9、cqui-sition or integration system,or both,from 5 to 35 min duringthe separation.3.3 Hexane,LC/UV grade.3.4 Acetonitrile,LC/UV grade.3.5 Corn OilObtain corn oil that is as pure and fresh aspossible to minimize peaks in nonvolatiles extractables chro-matogram.Alternatively,Miglyol 812(a fractionated c
10、oconutoil)or synthetic fat simulant HB 307 can be used as a substitutefor corn oil.3.6 Dimethylacetamide(DMAC),LC/UV grade.3.7 Conical Bottom Test Tubes,50 mL,graduated.3.8 Bishydroxyethyleneterephthalate(BHET).3.9 Diethylterephthalate(DET).3.10 Dimethylterephthalate(DMT).3.11 Fluoroptic Thermometry
11、 System.3.12 Temperature Probes,four,high temperature.3.13 Glass Beads,3 to 4 mm,clean thoroughly by rinsingwith methylene chloride followed by soaking for 30 min inacetonitrile.Dry thoroughly before using.1This test method is under the jurisdiction ofASTM Committee F02 on FlexibleBarrier Packaging
12、and is the direct responsibility of Subcommittee F02.15 onChemical/Safety Properties.Current edition approved April 1,2014.Published April 2014.Originallyapproved in 1991.Last previous edition approved in 2008 as F1349 08.DOI:10.1520/F1349-08R14.2For referenced ASTM standards,visit the ASTM website,
13、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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 NOTE1The11
14、6-in.(1.6-mm)diameter hole is for a Luxtron MIWtemperature sensing probe.Number of holes and location may vary byapplication.FIG.1 Collar Section of Waldorf Polytetrafluoroethylene Micro-wave Nonvolatile Extraction CellNOTE1Relieve thread at bottom.Collar must seal to bottom of cap.FIG.2 Cap Section
15、 of Waldorf Polytetrafluorethylene NonvolatileExtraction CellF1349 08(2014)2 3.14 Recommended Microwave Nonvolatile ExtractionCellWaldorf Polytetrafluoroethylene cell.3(See Figs.1-3).This cell must be constructed by a machine shop experiencedin working with polytetrafluoroethylene(PTFE).After micro-
16、waving oil in the cell,the cell should be rinsed with methylenechloride to remove residual oil and prevent carry-over.3.15 Solvent Concentration ApparatusKuderna-Danishevaporative concentrator,rotory evaporator;or Zymark Tur-boVap at a nitrogen pressure of 30 psi and a water bathtemperature of 50C.4.Procedure4.1 Temperature Measurement:4.1.1 Refer to Test Method F874 to determine the time andwater load specifications.4.2 Sample Preparation and Microwave Heating:NOTE1Always be sure the microwave
