分享
ASTM_D_6438_-_05_2022.pdf
下载文档

ID:172627

大小:108.88KB

页数:5页

格式:PDF

时间:2023-03-04

收藏 分享赚钱
温馨提示:
1. 部分包含数学公式或PPT动画的文件,查看预览时可能会显示错乱或异常,文件下载后无此问题,请放心下载。
2. 本文档由用户上传,版权归属用户,汇文网负责整理代发布。如果您对本文档版权有争议请及时联系客服。
3. 下载前请仔细阅读文档内容,确认文档内容符合您的需求后进行下载,若出现内容与标题不符可向本站投诉处理。
4. 下载文档时可能由于网络波动等原因无法下载或下载错误,付费完成后未能成功下载的用户请联系客服处理。
网站客服:3074922707
TM_D_6438_ _05_2022
Designation:D643805(Reapproved 2022)Standard Test Method forAcetone,Methyl Acetate,and ParachlorobenzotrifluorideContent of Paints,and Coatings by Solid PhaseMicroextraction-Gas Chromatography1This standard is issued under the fixed designation D6438;the number immediately following 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 is for the determination of acetone,methyl acetate,or parachlorobenzotrifluoride(PCBTF),orcombination of any of the three,in paints and coatings,by solidphase microextraction(SPME)headspace sampling,and sub-sequent injection into a gas chromatograph.It has beenevaluated for cellulose nitrate,acrylic,and urethane solvent-borne systems.The established working range of this testmethod is:acetone,28 to 90%;methyl acetate,12 to 22%;parachlorobenzotrifluoride,10 to 17%.There is no reason tobelieve that it will not work outside these ranges.A minormodification of this test method would make it suitable for theanalysis of the same analytes in water-borne coatings(see Note1).NOTE1Water-borne paints are internally standardized and dilutedwith water followed by addition of solid sodium chloride.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D3925 Practice for Sampling Liquid Paints and RelatedPigmented CoatingsD6133 Test Method for Acetone,p-Chlorobenzotrifluoride,Methyl Acetate or t-Butyl Acetate Content of Solvent-borne and Waterborne Paints,Coatings,Resins,and RawMaterials by Direct Injection Into a Gas ChromatographE180 Practice for Determining the Precision of ASTMMethods for Analysis and Testing of Industrial and Spe-cialty Chemicals(Withdrawn 2009)33.Terminology3.1 Abbreviations:3.1.1 PCBTFparachlorobenzotrifluoride(4-chlorobenzotrifluoride)3.1.2 MCBTFmetachlorobenzotrifluoride(3-chlorobenzotrifluoride)3.1.3 SPMEsolid phase microextraction3.1.4 VOCvolatile organic compound3.1.5 PEG/DVBpolyethylene glycol/divinylbenzene3.1.6 FIDflame ionization detector3.1.7 MSmass selective or mass spectral3.1.8 SIMselected ion monitoring3.1.9 GCgas chromatograph3.1.10 Srrepeatability standard deviations3.1.11 SRreproducibility standard deviations3.1.12 rrepeatability,95%confidence limit1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.21 on Chemical Analysis of Paints and Paint Materials.Current edition approved June 1,2022.Published July 2022.Originally approvedin 1999.Last previous edition approved in 2015 as D6438 05(2015).DOI:10.1520/D6438-05R22.2For 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 referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis 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 Trade(TBT)Committee.13.1.13 Rreproducibility,95%confidence limit4.Summary of Test Method4.1 A suitable aliquot of whole solvent-borne paint isinternally standardized and diluted with dioctyl phthalate.Theheadspace of this solution is sampled with an SPME fiber,which is then thermally desorbed in the injection port of a gaschromatograph onto a suitable capillary column.Either a flameionization or mass specific detector may be used to measurepeak areas of analytes and internal standards.5.Significance and Use5.1 In order to calculate the volatile organic content(VOC)of paints containing EPA exempt solvents,it is necessary toknow the acetone,methyl acetate,or parachlorobenzotrifluo-ride content.This gas chromatographic test method provides asimple and direct way for measuring

此文档下载收益归作者所有

下载文档
猜你喜欢
你可能关注的文档
收起
展开