1、Designation:D374100(Reapproved 2020)Standard Test Methods forAppearance of Admixtures Containing Halogenated OrganicSolvents1This standard is issued under the fixed designation D3741;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,th
2、e 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 These test methods cover the visual determination of thephysical appearance of admixtures containing halogenatedh
3、ydrocarbons.These test methods are qualitative test methods.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 therespo
4、nsibility 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-izati
5、on 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.Significance and Use2.1 These test methods are useful for determining theappearance of halogenated
6、hydrocarbons and their admixtures.TEST METHOD AUSING NESSLER TUBES3.Apparatus3.1 Color Comparison Tube,100 mL tall-form Nessler.Tubes should be selected so that the height of the 100 mLgraduation mark is 275 mm to 295 mm above the bottom of thetube with ground glass cap.3.2 Viewing Stand,constructed
7、 to permit visual observationof light transmitted through the Nessler tube in the direction ofits longitudinal axis.The viewing stand should be constructedso that white light is passed through or reflected off a whiteglass plate and directed with uniform intensity through thetube,and should be shiel
8、ded so that no light enters the tubefrom the side.4.Procedure4.1 Vigorously shake the sample to distribute any solidmatter that may be deposited on the bottom of the container.Transfer the sample to the tube and cap the tube.4.2 Place the tube in the viewing stand.Observe the samplethrough the longi
9、tudinal direction of the tube,looking forsuspended particles,floaters,sediment,turbidity,foaming,orfree water.5.Report5.1 Report the following information:5.1.1 Report extraneous contaminants as suspended or float-ing matter,sediments,turbidity,or free water.6.Precision and Bias6.1 This is a pass/fa
10、il test.It is not the intent of this testmethod to provide a method for determining extraneous matteron a quantitative basis.7.Keywords7.1 appearance;chlorinated organic solvents;organic sol-vents;solventsTEST METHOD BUSING A CLEAR,COLORLESSGLASS BOTTLE8.Apparatus8.1 Clear,Colorless Sample Bottle.8.
11、2 White Background and Black Background,in well-lighted area.9.Procedure9.1 Vigorously shake the sample to distribute any solidmatter that may be deposited on the bottom of the container.Ifthe sample is not in a clear,colorless bottle,transfer it to onein an exhaust hood.Immediately place the sample
12、 in front of a1These test methods are under the jurisdiction of ASTM Committee D26 onHalogenated Organic Solvents and Fire Extinguishing Agents and are the directresponsibility of Subcommittee D26.04 on Test Methods.Current edition approved April 1,2020.Published April 2020.Originallyapproved in 198
13、5.Last previous edition approved in 2015 as D374100(2015)1.DOI:10.1520/D374100R20.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 standard
14、ization 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.white background in a well-lighted area.Examine for sus-pended particles,floaters,sediment,turbi
15、dity,or free water.9.2 Vigorously shake the sample again.Immediately placethe sample in front of a black background in a well-lightedarea.Examine for suspended particles,floaters,sediment,turbidity,foaming,or free water.10.Report10.1 Report the following information:10.1.1 Report extraneous contamin
16、ants as suspended orfloating matter,sediments,turbidity,or free water.11.Precision and Bias11.1 This is a pass/fail test.It is not the intent of this testmethod to provide a method for determining extraneous matteron a quantitative basis.12.Keywords12.1 appearance;chlorinated organic solvents;organic sol-vents;solventsASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.Users of this standard are expressl
