ASTM F1519-1998(2014) Standard Test Method for Qualitative Analysis of Volatile Extractables in Microwave Susceptors Used to Heat Food Products《定性分析食品加热用微波炉感受器中挥发性可萃取物的标准试验方法》.pdf
《ASTM F1519-1998(2014) Standard Test Method for Qualitative Analysis of Volatile Extractables in Microwave Susceptors Used to Heat Food Products《定性分析食品加热用微波炉感受器中挥发性可萃取物的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM F1519-1998(2014) Standard Test Method for Qualitative Analysis of Volatile Extractables in Microwave Susceptors Used to Heat Food Products《定性分析食品加热用微波炉感受器中挥发性可萃取物的标准试验方法》.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: F1519 98 (Reapproved 2014)Standard Test Method forQualitative Analysis of Volatile Extractables in MicrowaveSusceptors Used to Heat Food Products1This standard is issued under the fixed designation F1519; the number immediately following the designation indicates the year oforiginal ado
2、ption 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 This
3、 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 identific
4、ation 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 and
5、/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 E260 for additio
6、nal 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 to e
7、stablish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2E260 Practice for Packed Column Gas ChromatographyF874 Test Method for Temperature Measurement and Pro-filing for Microwave SusceptorsF
8、1308 Test Method for Quantitating Volatile Extractables inMicrowave Susceptors Used for Food ProductsF1317 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 diffusion of th
9、evolatile 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 studies usi
10、ng 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 end use
11、 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 extractab
12、les onto a gas chromato-graphic column (Refs 12). 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 identica
13、l 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 minimizingthe amount and type of volatile extractables produced. The1This test meth
14、od is under the jurisdiction of ASTM Committee F02 on FlexibleBarrier Packaging and is the direct responsibility of Subcommittee F02.15 onChemical/Safety Properties.Current edition approved April 1, 2014. Published April 2014. Originallyapproved in 1994. Last previous edition approved in 2008 as F15
15、19 98(2008).DOI: 10.1520/F1519-98R14.2For referenced ASTM standards, visit 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
16、 parentheses refer to a list of references at the end ofthis test method.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1susceptor design, materials used or manufacturing processesinvolved can be evaluated.6. Interferences6.1 Gas Chro
17、matography/Mass 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
18、GC/IR. The retention time andmass spectrum or infrared spectrum of the volatile extractableshould be verified with a reference standard.6.2 Apparatus and MaterialsMethod interferences may becaused by contamination from vials, septa, syringes, etc.,leading to misinterpretation of results at trace lev
19、els. All of thematerials 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.
20、 Use nosolvents.7.2.1 Vials40 mL.7.2.2 Culture Tubes10 by 75 mm.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 lit
21、eratureregarding 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.F
22、ill tube with adsorbent, 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 250C
23、Time 2 60 min7.5.3 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-
24、bent). Exercise care 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
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