1、Designation:D601797(Reapproved 2020)1Standard Test Method forDetermination of Magnesium Sulfate(Epsom Salt)inLeather1This standard is issued under the fixed designation D6017;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year o
2、f last revision.A number in parentheses 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.1NOTEAn editorial change to update the source o
3、f Federal Test Standard No.311 was made in April 2020.1.Scope1.1 This test method covers quantitatively determining themagnesium sulfate(epsom salt)in leather.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
4、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
5、 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.
6、Referenced Documents2.1 ASTM Standards:2D3790 Test Method for Volatile Matter(Moisture)ofLeather by Oven Drying2.2 Federal Standards:Federal Test Standard No.311,Method 6541 MagnesiumSulfate(Epsom Salt)33.Significance and Use3.1 This test method distinguishes magnesium sulfate fromother water solubl
7、e non-tanning salts found in leather.4.Apparatus4.1 Platinum Crucible.4.2 Filtering Crucible.4.3 Suction Flask.4.4 Muffle Furnace.5.Reagents5.1 Hydrochloric Acid,specific gravity 1.19.5.2 Nitric Acid,specific gravity 1.42.5.3 Ammonium Chloride.5.4 Ammonium Hydroxide,1 to 1 and 1 to 9 parts by volume
8、with distilled water.5.5 Ammonium Nitrate Solution,10 g dissolved in distilledwater and made up to 100 mL.5.6 Ammonium Oxalate,saturated solution.5.7 Ferric Chloride Solution,10 g dissolved in distilledwater and made up to 100 mL.5.8 Methyl Orange Indicator,0.05%.5.9 Sodium Ammonium Hydrogen Phospha
9、te,saturated so-lution.6.Procedure6.1 Unless otherwise specified in the material specification,determine the moisture content of the composite sample fromwhich the test specimen is drawn,in accordance with TestMethod D3790.Determine the weight of the composite speci-mens for moisture content at the
10、same time and under the sameambient conditions as the specimens weighed for chemicaltests.6.2 Place the specimen in a tared porcelain crucible,5 gweighed to the nearest 0.001 g,and record the value as W2.1This test method is under the jurisdiction of ASTM Committee D31 on Leatherand is the direct re
11、sponsibility of Subcommittee D31.06 on ChemicalAnalysis.Thistest method was developed from Federal Test Method Standard No.311,Method 6541 in cooperation with the U.S.Army Natick Research Development&Engineering Center,Natick MA and the Defense Personnel Support CenterDirectorate of Clothing and Tex
12、tiles,Philadelphia PA.Current edition approved April 1,2020.Published April 2020.Originallyapproved in 1996.Last previous edition approved in 2015 as D6017 97(2015).DOI:10.1520/D6017-97R20E01.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at servic
13、eastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from https:/quicksearch.dla.mil.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international stan
14、dard 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.Place the
15、 weighed specimen in a cold muffle furnace orprecarbonize over a burner prior to placing in a hot furnace.Gradually raise the temperature of the furnace to 600 6 25Cand maintain at this temperature for 60 min.Remove thecrucible and contents,cool in a desiccator,and weigh.Replacein the furnace at 600
16、 6 25C for 30 min and repeat the coolingand weighing procedure until a constant weight is obtained(60.01 g).If it is difficult to obtain a constant weight,leach theresidue with hot distilled water and filter through an ashlessfilter paper.Place the filter paper in the crucible and ash.Addthe filtrate to the crucible and evaporate.The crucible shall thenbe put back in the muffle furnace and heated,cooled,andweighed as above until a constant weight(60.01 g)has beenobtained.6.3 Moisten the ash with
