ASTM F1519-1998(2008) Standard Test Method for Qualitative Analysis of Volatile Extractables in Microwave Susceptors Used to Heat Food Products《加热食品用的微波感受器挥发性萃取物定性分析标准试验方法》.pdf
《ASTM F1519-1998(2008) Standard Test Method for Qualitative Analysis of Volatile Extractables in Microwave Susceptors Used to Heat Food Products《加热食品用的微波感受器挥发性萃取物定性分析标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM F1519-1998(2008) Standard Test Method for Qualitative Analysis of Volatile Extractables in Microwave Susceptors Used to Heat Food Products《加热食品用的微波感受器挥发性萃取物定性分析标准试验方法》.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: F 1519 98 (Reapproved 2008)Standard Test Method forQualitative Analysis of Volatile Extractables in MicrowaveSusceptors Used to Heat Food Products1This standard is issued under the fixed designation F 1519; the number immediately following the designation indicates the year oforiginal a
2、doption 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.1. Scope1.1 This test method is applicable to complete microwavesusceptors.1.2 Th
3、is test method covers a procedure for identifyingvolatile extractables which are released when a microwavesusceptor sample is tested under simulated end use conditions.The extractables are identified using gas chromatography/massspectrometry (GC/MS).1.3 This test method was evaluated for the identif
4、ication ofa variety of volatile extractables at a level of 0.010 g/in.2ofsusceptor surface. For extractables not evaluated, the analystshould perform studies to determine the level of extractable atwhich identification is achievable.1.4 The analyst is encouraged to run known volatile extract-ables a
5、nd/or incorporate techniques such as gaschromatography/high resolution mass spectrometry (GC/HRMS), gas chromatography/infrared spectroscopy (GC/IR)or other techniques to aid in verifying the identity of oridentifying unknown volatile extractables. The analyst is re-ferred to Practice E 260 for addi
6、tional guidance.1.5 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.6 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 t
7、o establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2E 260 Practice for Packed Column Gas ChromatographyF 874 Test Method for Temperature Measurement and Pro-filing for Microwave Suscep
8、torsF 1308 Test Method for Quantitating Volatile Extractablesin Microwave Susceptors Used for Food ProductsF 1317 Test Method for Calibration of Microwave Ovens3. Terminology3.1 Definitions:3.1.1 diffusion trappingthe collection of volatile extract-ables on an adsorbent by means of the mass diffusio
9、n of thevolatile extractables (1).33.1.2 microwave susceptorspackaging material which,when placed in a microwave field interacts with the field andprovides heating for the food products the package contains.3.1.3 volatile extractablesthose compounds that give 50 % recovery in spike and recovery stud
10、ies using the appli-cable volatile extractables method. Extractability does notnecessarily imply migration of the extractable species to thefood product being heated on the susceptor.4. Summary of Test Method4.1 The volatile extractables are released from the susceptorwhen it has been heated to its
11、end use heating conditions(temperature and heating time) using a thermostatically con-trolled oil bath or calibrated microwave oven. The releasedvolatile extractables are concentrated by diffusion trapping onan adsorbent. After adsorption is complete, the adsorbent isheated to desorb the volatile ex
12、tractables onto a gas chromato-graphic column (Refs 17). The volatile extractables are thenseparated using a gas chromatograph and detected by a massspectrometer. The volatile extractable identifications are con-firmed by comparing their retention times and mass spectra toreference compounds under i
13、dentical GC/MS conditions.5. Significance and Use5.1 This test method is intended to identify volatile extract-ables that may be emitted from microwave susceptor materialduring use. It may be a useful procedure to assist in minimizing1This test method is under the jurisdiction of ASTM Committee F02
14、on FlexibleBarrier Packaging and is the direct responsibility of Subcommittee F02.15 onChemical/Safety Properties.Current edition approved Oct. 1, 2008. Published November 2008. Originallyapproved in 1994. Last previous edition approved in 2003 as F 1519 98(2003).2For referenced ASTM standards, visi
15、t 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 page onthe ASTM website.3The boldface numbers in parentheses refer to a list of references at the end ofthis test method.
16、1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.the amount and type of volatile extractables produced. Thesusceptor design, materials used or manufacturing processesinvolved can be evaluated.6. Interferences6.1 Gas Chromatography/Mas
17、s SpectrometryThe GCconditions or column given may not exhibit sufficient resolu-tion to identify all the volatile extractables. Alternate tech-niques should be used to identify the unresolved volatileextractables such as alternate GC conditions, an alternate GCcolumn, GC/HRMS, and/or GC/IR. The ret
18、ention time andmass spectrum or infrared spectrum of the volatile extractableshould be verified with a reference standard.6.2 Apparatus and MaterialsMethod interferences maybe caused by contamination from vials, septa, syringes, etc.,leading to misinterpretation of results at trace levels. All of th
19、ematerials must be routinely demonstrated to be free fromcontamination under conditions of the analysis by runningblanks.7. Apparatus and Reagents7.1 Sample CutterNo. 14 cork borer.7.2 GlasswareWash all glassware thoroughly and dry in a125C air oven for a minimum of 4 h prior to using. Use nosolvent
20、s.7.2.1 Vials40 mL.7.2.2 Culture Tubes10by75mm.7.3 Vial CapsScrew caps for 7.2.1 vials.7.4 Vial SeptaPolytetrafluoroethylene PTFE faced siliconbacked septa, 22 mm diameter. Place septa into a vacuum ovenat 135C for 16 h prior to using.7.5 Volatile AdsorbentRefer to manufacturers literatureregarding
21、physical, chemical, absorptive and desorptive char-acteristics of adsorbent.7.5.1 AdsorbentTenax TA, 35/60 mesh.7.5.2 ConditioningPlug one end of a 14 cm long, 6.35outside diameter by 5.3 mm inside diameter tube, premiumgrade 304 stainless steel with a plug of silanized glass wool.Fill tube with ads
22、orbent, and plug other end with silanizedglass wool. Connect the tube to the injection port outlet of theGC, set the UHP helium flow to 30 mL/min and conditionadsorbent using the following program.Injection temperature 250CTemperature 1 70CTime 1 30 minRate 10C/minTemperature 2 250CTime 2 60 min7.5.
23、3 StorageCap both ends of the tube after it cools,move to a chemical free area, uncap one end, remove glasswool, tap tube to transfer adsorbent to 40 mL glass vial, purgevial with UHP helium or argon for 1 min and seal with aconditioned PTFE/silicon septa (PTFE surface toward adsor-bent). Exercise c
24、are in handling the adsorbent.7.5.4 BlanksThe adsorbent should be tested for contami-nation prior to being used.7.6 Oil BathCirculating bath capable of being heated to250 6 1C. Use silicone oil to heat vials.7.7 ThermometersCapable of measuring up to 250C.Calibrate thermometer with a NIST standardiz
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