ASTM E806-2017 8224 Standard Test Method for Carbon Tetrachloride and Chloroform in Liquid Chlorine by Direct Injection (Gas Chromatographic Procedure)《用直接注射法对液态氯中四氟化碳和三氯甲烷的标准试验方法(.pdf
《ASTM E806-2017 8224 Standard Test Method for Carbon Tetrachloride and Chloroform in Liquid Chlorine by Direct Injection (Gas Chromatographic Procedure)《用直接注射法对液态氯中四氟化碳和三氯甲烷的标准试验方法(.pdf》由会员分享,可在线阅读,更多相关《ASTM E806-2017 8224 Standard Test Method for Carbon Tetrachloride and Chloroform in Liquid Chlorine by Direct Injection (Gas Chromatographic Procedure)《用直接注射法对液态氯中四氟化碳和三氯甲烷的标准试验方法(.pdf(7页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: E806 17Standard Test Method forCarbon Tetrachloride and Chloroform in Liquid Chlorine byDirect Injection (Gas Chromatographic Procedure)1This standard is issued under the fixed designation E806; the number immediately following the designation indicates the year oforiginal adoption or,
2、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. Scope*1.1 This test method is designed for the determination ofcarbon tetrachloride (CCl4)
3、 and chloroform (CHCl3) in liquidchlorine. The lower limit of detection is dependent on thesample size and the instrument used; five ppm (w/w) isachievable.1.2 Review the current Safety Data Sheet (SDS) for detailedinformation concerning toxicity, first aid procedures, and safetyprecautions.1.3 The
4、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 theresponsibility of the user of this standard to establish appro-priate
5、 safety and health practices and determine the applica-bility of regulatory limitations prior to use. Specific hazardsstatements are given in Section 7 and in 9.2.3.2. Referenced Documents2.1 ASTM Standards:2E180 Practice for Determining the Precision of ASTMMethods for Analysis and Testing of Indus
6、trial and Spe-cialty Chemicals (Withdrawn 2009)32.2 Federal Standard:449 CFR 173 Code of Federal Regulations Title 49 Transpor-tation; ShippersGeneral Requirements for Shipments andPackagings, including Sections:173.304 Charging of Cylinders with Liquefied CompressedGas173.314 Requirements for Compr
7、essed Gases in Tank Cars173.315 Compressed Gases in Cargo Tanks and PortableTank Containers2.3 Other Document:Chlorine Institute Pamphlet No. 1 Chlorine Basics53. Summary of Test Method3.1 A sample of liquid chlorine is injected into a gaschromatograph (GC), equipped with a column capable ofseparati
8、ng CCl4and CHCl3from Cl2and other impurities,using a suitable syringe. The amounts of CCl4and CHCl3inthe sample are determined by comparison of the areas of thepeaks, obtained with the samples, to areas of peaks obtainedwith suitable calibration standards, under the same conditions.4. Significance a
9、nd Use4.1 CCl4and CHCl3may be present in trace amounts inliquid chlorine. The use of chlorine to purify water would thentransfer these compounds to the water. Therefore, when theconcentrations of the CCl4and CHCl3in the liquid chlorine areknown, the maximum amounts contributed to the water by thechl
10、orine can be estimated.5. Apparatus5.1 Gas Chromatograph, equipped with:5.1.1 Injection Port, must be lined with glass, Monel,6ornickel; or column must be installed for on-column injection.5.1.2 Septa, from Viton.7Silicone septa may produce arti-facts that may interfere with the analysis.5.1.3 Colum
11、n, Column Materials, and Packing, must becompatible with chlorine. Silanized supports and silanizedglass wool must be avoided. Column must be able to separateCl2, CCl4, and CHCl3. Columns that have been found to besuitable are:1This test method is under the jurisdiction of ASTM Committee D16 onAroma
12、tic Hydrocarbons and Related Chemicals and is the direct responsibility ofSubcommittee D16.16 on Industrial and Specialty Product Standards.Current edition approved March 1, 2017. Published March 2017. Originallyapproved in 1981. Last previous edition approved in 2008 as E806 08. DOI:10.1520/E0806-1
13、7.2For 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 last approved version of this historical standard is r
14、eferenced onwww.astm.org.4Available from U.S. Government Printing Office, Superintendent ofDocuments, 732 N. Capitol St., NW, Washington, DC 20401-0001, http:/www.access.gpo.gov.5Available from The Chlorine Institute Inc., 1300 Wilson Blvd., Suite 525,Arlington, VA 22209, https:/www.chlorineinstitut
15、e.org.6Monel is a registered trademark of Special Metals Corporation.7Viton is a registered trademark of The Chemours Company.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United St
16、atesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to T
17、rade (TBT) Committee.15.1.3.1 Nickel Tubing, 3.05 m by 3.175 mm outsidediameter, packed with 10 % sodium chloride solution onPorasil C8(see Appendix X1 for packing preparation). This isthe preferred packing.5.1.3.2 Polytetrafluoroethylene Tubing, 3.05mby2mminside diameter, packed with 20 % Kel-F9No.
18、 10 oil on 60/80mesh Chromosorb10WAW.5.1.3.3 Glass Tubing, 3.05 m by 2 mm inside diameter,packed with 20 % Halocarbon111025 on 60/80 mesh Chromo-sorb W AW.5.1.4 Flame Ionization Detector.5.1.5 Recorder, compatible with the GC detector output.5.1.6 Electronic Integrator (optional), compatible with th
19、eGC detector output.5.2 Balance, capacity 5000 g, reading to 6 1g.126. Reagents and Materials6.1 Purity of ReagentsUnless otherwise indicated, it isintended that all reagents shall conform to the specifications ofthe Committee onAnalytical Reagents of theAmerican Chemi-cal Society, where such specif
20、ications are available.13Othergrades may be used, provided it is first ascertained that thereagent is of sufficiently high purity to permit its use withoutlessening the accuracy of the determination.6.2 Chlorine, liquid, with less than 10 g/g each of CCl4andCHCl3. This may be prepared by condensing
21、the gaseous phaseabove regular production chlorine.146.3 Carbon Tetrachloride, reagent grade.146.4 Chloroform, reagent grade.146.5 Sample Cylinder Assembly (Fig. 1), consisting of:6.5.1 Sample Cylinders;15nickel, Monel, or tantalum (Note1), 400-mL capacity, double-ended, specially cleaned (Note 2).6
22、.5.2 Valves, having a packing resistant to liquid chlorine.166.5.3 Holder for a Septum, that can be easily assembled.17NOTE 1Carbon or stainless steel cylinders and fittings are not suitableas CHCl3is unstable in the presence of FeCl3and Cl2.NOTE 2A procedure for cleaning cylinders and valves, for u
23、se withliquid chlorine, is given in Appendix X2.6.6 Fittings, for transferring chlorine from one cylinder toanother.6.7 Syringe, 10 to 100-L, capable of holding liquid chlo-rine under pressure, with 26-gage disposable needle.NOTE 3Disposable needles are recommended because corrosion withpermanent ne
24、edles may cause problems.7. Hazards7.1 Chlorine is a corrosive and toxic material. A well-ventilated fume hood should be used to house all testequipment, except the gas chromatograph, when this product isanalyzed in the laboratory.7.2 The analysis should be attempted only by persons whoare thoroughl
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