ASTM C1441-2013 Standard Test Method for the Analysis of Refrigerant 114 Plus Other Carbon-Containing and Fluorine-Containing Compounds in Uranium Hexafluoride via Fourier-Transfor.pdf
《ASTM C1441-2013 Standard Test Method for the Analysis of Refrigerant 114 Plus Other Carbon-Containing and Fluorine-Containing Compounds in Uranium Hexafluoride via Fourier-Transfor.pdf》由会员分享,可在线阅读,更多相关《ASTM C1441-2013 Standard Test Method for the Analysis of Refrigerant 114 Plus Other Carbon-Containing and Fluorine-Containing Compounds in Uranium Hexafluoride via Fourier-Transfor.pdf(8页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C1441 13Standard 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 foll
2、owing 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
3、 covers determining 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 fo
4、r this test method. 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 equivalen
5、t at room temperature. 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
6、percent. This is Part A.1.2 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 spec
7、trum is the UF6spectrum or ifthe 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
8、B pertains toSections 12-16.1.4 These 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 radiati
9、on in a region where uraniumhexafluoride 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 t
10、he analyte.1.6 These test methods can also 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 avai
11、lability ofhigh quality standards for these gases 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 k
12、nown calibration or known “K”(values) for these other 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
13、appro-priate safety and health practices and determine 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 RadiochemicalAnalysis of1This test method is under the jurisdic
14、tion ofASTM Committee C26 on Methodsof Test.Current edition 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
15、, 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.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 194
16、28-2959. United States1Uranium HexafluorideC787 Specification for Uranium 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 DocumentU
17、SEC-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 accordance with Terminolog
18、y C859,a low concentration level that can be achieved with thesemethods is 0.003 mol percent at the 95 % confidence level.3.1.2 FTIR, nFourier-transform infrared spectroscopy.3.1.3 K, ninfrared absorbance constant in pressure units,where:K 5mole percent concentration standard pressure!absorbance(1)3
19、.1.4 “2S” container, na nickel container with a 1.0 Lcapacity.4. Summary of Test Methods4.1 Part A is based on the collection of an all gas sample ofUF6. The gas sample is then analyzed at room temperature viaFTIR to determine the percent Refrigerant-114 in uraniumhexafluoride.4.2 Part B is based on
20、 the collection of an all gas sample ofUF6. There are two differences with the Part A:the calibration is performed in UF6.the path length used is 5 meters equipped with zincselenide (ZnSe) optics.4.3 In Parts A and B, the pressure is kept low enough sothat the manifold and sample cell are filled onl
21、y with gaseousUF6.5. Significance and Use5.1 This test method (Part A) utilizes FTIR spectroscopy todetermine the percent Refrigerant-114 impurity in uraniumhexafluoride. Refrigerant-114 is an example of an impurity gasin uranium hexafluoride.6. Hazards6.1 Uranium hexafluoride is considered to be a
22、hazardousmaterial. It is a highly reactive and toxic substance in additionto its radioactive properties. It must be handled as a gas innickel containers and well-conditioned nickel manifolds toensure safety. Suitable handling procedures are described inUSEC-651.7. Apparatus (Part A)7.1 Fourier-Trans
23、form Infrared Spectrophotometer, or dis-persive infrared spectrophotometer set up to collect data in therange 4000 to 400 cm1with 6 2cm1resolution or better.7.2 A Manifold System, built with materials of constructioninert to fluorine-bearing gases. The manifold system shall beconditioned and passiva
24、ted with an appropriate fluorinatingagent. (See Annex A2.)7.3 A Nickel Sample Cell equipped with silver chloridewindows. The pathlength used in these experiments is 10 cm(0.1m).7.4 A Pressure Gage, which can be read to 1 Pa is necessary.7.5 Absorbance Data, can be determined to 0.001 units.8. Calibr
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMC14412013STANDARDTESTMETHODFORTHEANALYSISOFREFRIGERANT114PLUSOTHERCARBONCONTAININGANDFLUORINECONTAININGCOMPOUNDSINURANIUMHEXAFLUORIDEVIAFOURIERTRANSFORPDF
链接地址:http://www.mydoc123.com/p-464688.html