1、Designation:C144113Standard Test Method forThe Analysis of Refrigerant 114,Plus Other Carbon-Containing and Fluorine-Containing Compounds in UraniumHexafluoride via Fourier-Transform Infrared(FTIR)Spectroscopy1This standard is issued under the fixed designation C1441;the number immediately following
2、 the designation indicates the year oforiginal adoption 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 covers dete
3、rmining the concentrationsof refrigerant-114,some other carbon-containing and fluorine-containing compounds,hydrocarbons,and partially or com-pletely substituted halohydrocarbons that may be impurities inuranium hexafluoride when looked for specifically.The twooptions are outlined for this test meth
4、od.They are designatedas Part A and Part B.1.1.1 To provide instructions for performing Fourier-Transform Infrared(FTIR)spectroscopic analysis for thepossible presence of Refrigerant-114 impurity in a gaseoussample of uranium hexafluoride,collected in a“2S”containeror equivalent at room temperature.
5、The all gas procedureapplies to the analysis of possible Refrigerant-114 impurity inuranium hexafluoride,and to the gas manifold system used forFTIR applications.The pressure and temperatures must becontrolled to maintain a gaseous sample.The concentrationunits are in mole percent.This is Part A.1.2
6、 The method discribed in part B is more efficient becausethere isnt matrix effect.FTIR spectroscopy identifies bonds asC-H,C-F,C-Cl.To quantify HCH compounds,these com-pounds must be known and the standards available to do thecalibration.After a screening,if the spectrum is the UF6spectrum or ifthe
7、other absorption peaks allow the HCH quantification,thistest method can be used to check the compliance of UF6asspecified in Specifications C787 and C996.The limits ofdetection are in units of mole percent concentration.1.3 Part A pertains to Sections 7 10and Part B pertains toSections 12 16.1.4 The
8、se test options are applicable to the determination ofhydrocarbons,chlorocarbons,and partially or completely sub-stituted halohydrocarbons contained as impurities in uraniumhexafluoride(UF6).Gases such as carbon tetrafluoride(CF4),which absorb infrared radiation in a region where uraniumhexafluoride
9、 also absorbs infrared radiation,cannot be ana-lyzed in low concentration via these methods due to spectraloverlap/interference.1.5 These test options are quantitative and applicable in theconcentration ranges from 0.003 to 0.100 mole percent,de-pending on the analyte.1.6 These test methods can also
10、 be used for the determina-tion of non-metallic fluorides such as silicon tetrafluoride(SiF4),phosphorus pentafluoride(PF5),boron trifluoride(BF3),and hydrofluoric acid(HF),plus metal-containing fluoridessuch as molybdenum hexafluoride(MoF6).The availability ofhigh quality standards for these gases
11、is necessary for quanti-tative analysis.1.7 These methods can be extended to other carbon-containing and inorganic gases as long as:1.7.1 There are not any spectral interferences from uraniumhexafluorides infrared absorbances.1.7.2 There shall be a known calibration or known“K”(values)for these othe
12、r gases.1.8 The values stated in SI units are to be regarded as thestandard.1.9 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 health practices and determine
13、the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C761 Test Methods for Chemical,Mass Spectrometric,Spectrochemical,Nuclear,and Radiochemical Analysis of1This test method is under the jurisdiction ofASTM Committee C26 on Methodsof Test.Current editio
14、n approved April 1,2013.Published July 2013 Originally approvedin 1999.Last previous edition approved in 2004 as C144104,which waswithdrawn in January 2013 and reinstated in April 2013.DOI:10.1520/C1441-13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Ser
15、vice 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 Uranium HexafluorideC787 Specification for Uranium
16、 Hexafluoride for Enrich-mentC859 Terminology Relating to Nuclear MaterialsC996 Specification for Uranium Hexafluoride Enriched toLess Than 5%235UC1052 Practice for Bulk Sampling of Liquid UraniumHexafluoride2.2 USEC DocumentUSEC-651 Uranium Hexafluoride:A Manual of Good Han-dling Practices33.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 detection limit,nbased on the minimum absorbanceobtainable at a given pressure to yield a meaningful result inaccordance with Eq 2.In acco
