1、Designation:D138507(Reapproved 2018)1Standard Test Method forHydrazine in Water1This standard is issued under the fixed designation D1385;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 parenthes
2、es indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1NOTEWarning notes were editorially updated throughout and the Keywords section was
3、added in August 2018.1.Scope1.1 This test method covers2the colorimetric determinationof hydrazine in boiler feed waters,condensates,natural,andwell waters that have been treated with hydrazine(N2H4).Thistest method is usable in the range from 5.0 to 200 g/L(ppb)hydrazine.The range is for photometri
4、c measurements made at458 nm in 50 mm cell.Higher concentrations of hydrazine canalso be determined by taking a more diluted sample.1.2 It is the usersresponsibility to ensure the validity of thistest method for untested types of waters.1.3 The values stated in SI units are to be regarded asstandard
5、.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 safety,health,and environmental practices and deter-mine t
6、he applicability of regulatory limitations prior to use.For specific precautionary statements,see 5.3,8.4,and Foot-note 5.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevel
7、opment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3D1066 Practice for Sampling SteamD1129 Terminology Relating to WaterD1193 Specification for Reagent WaterD3370 Pract
8、ices for Sampling Water from Closed ConduitsD5810 Guide for Spiking into Aqueous SamplesD5847 Practice for Writing Quality Control Specificationsfor Standard Test Methods for Water AnalysisE60 Practice for Analysis of Metals,Ores,and RelatedMaterials by SpectrophotometryE275 Practice for Describing
9、and Measuring Performance ofUltraviolet and Visible Spectrophotometers3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this standard,refer toTerminology D1129.4.Summary of Test Method4.1 When a solution of p-dimethylaminobenzaldehyde inmethyl alcohol and hydrochloric acid is added
10、 to hydrazine indiluted hydrochloric acid solution,a characteristic yellow colorof p-dimethylaminobenzalazine is formed.The yellow colorformed is proportional to the hydrazine present and is in goodagreement with Beers law in the range from 5.0 to 200 g/L(ppb)hydrazine.5.Significance and Use5.1 Hydr
11、azine is a man-made chemical and is not found innatural waters.The determination of hydrazine is usually madeon boiler feedwaters,process waters,and other waters thathave been treated with hydrazine(N2H4)for the purpose ofmaintaining residuals to prevent corrosion by dissolved oxy-gen.This reducing
12、chemical reacts with dissolved oxygen toform nitrogen and water.However,under certain conditions it1This test method is under the jurisdiction of ASTM Committee D19 on Waterand is the responsibility of Subcommittee D19.03 on Sampling Water andWater-Formed Deposits,Analysis of Water for Power Generat
13、ion and Process Use,On-Line Water Analysis,and Surveillance of WaterCurrent edition approved Aug.1,2018.Published September 2018.Originallyapproved in 1967.Last previous edition approved in 2013 as D1385 07(2013)1.DOI:10.1520/D1385-07R18E01.2For further information on this test method,the following
14、references may be ofinterest:Watt,G.W.,and Chrisp,J.D.,“Spectrophotometric Method for the Determinationof Hydrazine,”Analytical Chemistry,Vol 24,No.12,1952,pp.20062008;andWood,P.R.,“Determination of Maleic Hydrazide Residues in Plant and AnimalTissue,”Analytical Chemistry,Vol 25,No.12,1953,pp.187918
15、83.3For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,
16、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.1 can also decompose to form ammonia and nitrogen.Hydrazineis used extensively as a preboiler treatment chemical forhigh-pressure boilers to
