ASTM_D_6050_-_21.pdf

Designation:D605021Standard Test Method forDetermination of Insoluble Solids in Organic LiquidHazardous Waste1This standard is issued under the fixed designation D6050;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 covers the determination of the ap-proximate amount of insoluble,suspended solid material inorganic liquid hazardous waste(OLHW).1.2 This test method is intended to be used in approximatingthe amount of insoluble,suspended solids in determining thematerial-handling characteristics and fuel quality of OLHW.Itis not intended to replace more sophisticated procedures for thedetermination of total solids.1.3 UnitsThe values stated in SI units are to be regardedas standard.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 the applicability of regulatory limitations prior to use.1.5 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Documents2.1 ASTM Standards:D96 Test Method for Water and Sediment in Crude Oil byCentrifuge Method(Field Procedure)(Withdrawn 2000)2D5283 Practice for Generation of Environmental Data Re-lated to Waste Management Activities:Quality Assuranceand Quality Control Planning and ImplementationD5681 Terminology for Waste and Waste Management3.Terminology3.1 For definitions of terms used in this test method,refer toTerminology D5681.4.Summary of Test Method4.1 A 10-mL aliquot of OLHW sample is decanted into a15-mL graduated centrifuge tube and centrifuged for 3 min.The separated liquid phase of the OLHW is decanted into anappropriate waste vessel.The centrifuge tube with the sepa-rated solid material is brought back to its original 10-mLvolume with a user-selected blend of clean solvents andagitated to mix the solid and liquid phases.The tube iscentrifuged for 2 min,and the amount of remaining solidmaterial is read.5.Significance and Use5.1 Ahigh percentage of insoluble,suspended solid materialcan create pumping,filtering,or grinding difficulties in theoff-loading of bulk shipments of OLHW and can contribute toexcessive wear on processing equipment.High solids can alsodecrease the quality and consistency of commingled solutionsby decreasing the effectiveness of agitation in storage tanks.These issues are of concern to the recycling industries(solvents,paints,and other materials handled in significantquantities)in addition to those activities that propose to use thewaste as a fuel.6.Apparatus6.1 CentrifugeCapable of spinning two or more centrifugetubes at a speed controlled to give a relative centrifugal forceof between 1200 to 1400.The speed to achieve this is generallybetween 3100 to 3600 rpm.The rotation speed necessary toachieve the relative centrifugal force can be determined fromone of the following equations:rpm5 1335rcfd(1)rpm5 265rcfd(2)where:rpm=rotation speed,in revolutions per min,1This test method is under the jurisdiction of ASTM Committee D34 on WasteManagement and is the direct responsibility of Subcommittee D34.01.06 onAnalytical Methods.Current edition approved May 1,2021.Published May 2021.Originallyapproved in 1997.Last previous edition approved in 2016 as D6050 09(2016).DOI:10.1520/D6050-21.2The 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.1rcf=relative centrifugal force,andd=diameter of swing,in mm(Eq 1)or in.(Eq 2),measured between the tips of opposite tubes when thetubes are in rotating position.NOTE1Eq 1 and Eq 2 are described in Test Method D96.6.2 Centrifuge TubesCentrifuge tubes shall be coneshaped,made of glass or a solvent-resistant plastic or polymer,have a minimum capacity of 15 mL when filled to volume,andgraduated with minimum subdivisions of 0.5 mL.Class Acentrifuge tubes are recommended.If any grade other thanClass A is used,refer to Section 9.7.Reagents and Materials7.1 Purity of ReagentsReagent grade chemicals sha