1、Designation: D6050 09 (Reapproved 2016)Standard 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 revi
2、sion, 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 m
3、aterial 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 thedeterm
4、ination of total solids.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 and health practices and determine the applica-bility of regulatory limitations prio
5、r to use.2. Referenced Documents2.1 ASTM Standards:D96 Test Method for Water and Sediment in Crude Oil byCentrifuge Method (Field Procedure)23. Summary of Test Method3.1 A 10-mL aliquot of OLHW sample is decanted into a15-mL graduated centrifuge tube and centrifuged for 3 min.The separated liquid ph
6、ase 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 amoun
7、t of remaining solidmaterial is read.4. Significance and Use4.1 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 also
8、decrease 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 us
9、e thewaste as a fuel.5. Apparatus5.1 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 centri
10、fugal force can be determined fromone of the following equations:rpm 5 1335rcfd(1)rpm 5 265rcfd(2)where:rpm = rotation speed, in revolutions per min,rcf = relative centrifugal force,d = diameter of swing, in mm (Eq 1) or in. (Eq 2),measured between the tips of opposite tubes when thetubes are in rot
11、ating position.NOTE 1Eq 1 and Eq 2 are described in Test Method D96.5.2 Centrifuge Tubes Centrifuge 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 Acent
12、rifuge tubes are recommended. If any grade other thanClass A is used, refer to the section on Calibration andStandardization.6. Reagents and Materials6.1 Purity of ReagentsReagent grade chemicals shall beused in all tests. Unless otherwise indicated, it is intended thatall reagents conform to the sp
13、ecifications of the Committee onAnalytical Reagents of the American Chemical Society where1This 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 Feb. 1, 2016. Publis
14、hed February 2016. Originallyapproved in 1997. Last previous edition approved in 2009 as D6050 09. DOI:10.1520/D6050-09R16.2Withdrawn. The approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA
15、 19428-2959. United States1such specifications are available.3Other grades may be used,providing that it is first ascertained that the reagent is ofsufficiently high purity to permit its use without lessening theaccuracy of the determination.6.2 Clean Solvent BlendThe user should formulate theclean
16、solvent blend based on the “average” normal chemicalcomposition of the commingled OLHW. The chemical compo-sition of OLHW is usually determined by gas chromatographicanalysis. The clean solvent blend will vary in complexitydepending on the specifications of the user.NOTE 2The clean solvent blend may
17、 be as simple as a singlecomponent (for example, toluene) or a complex mixture of aliphatic andaromatic hydrocarbons, alcohols, esters, ketones, ethers, terpenoids, andhalogenated compounds. The user should formulate the clean solventblend based on compositional knowledge of the OLHW that the sample
18、material is to be commingled with. If the commingled OLHW containswater, it may be appropriate to include in the clean solvent blend.7. Sample7.1 Because settling of insoluble solid material in liquidsamples is probable, the laboratory sample should be thor-oughly mixed by shaking prior to withdrawi
19、ng a portion fortesting.8. Calibration and Standardization8.1 Centrifuge tubes other than ClassAmust be periodicallychecked for accuracy. The frequency of this check will bedetermined by the user, but should be minimally done for eachnew box or lot number of tubes.9. Procedure9.1 Fill a centrifuge t
20、ube to the 10-mL graduation mark withthe OLHW sample.NOTE 3It will be necessary to use an additional tube with an equalmass of water or other suitable liquid to balance the centrifuge.9.2 Place the tubes from 9.1 in the trunnion cups orcentrifuge tube slots on opposite sides of the centrifuge. Close
21、the centrifuge lid and engage safety lock, if so equipped.9.3 Set the centrifuge speed (r/min) to provide a minimumrelative centrifugal force between 1200 to 1400 (see 5.1).9.4 Engage centrifuge, and allow to spin for 3 min.9.5 Remove the tube containing OLHW, and decant theseparated liquid phase to
22、 an appropriate waste vessel.9.6 Return the tube with solids to its original 10-mL volumewith the clean solvent blend. Cap or stopper the tube and shakevigorously in order to completely mix the centrifuged solidphase with the solvent phase. It may be necessary to use aVortex mixer for thorough mixin
23、g.9.7 Replace the OLHW tube in the centrifuge, and setcentrifuge as described in 9.2 and 9.3.9.8 Engage centrifuge, and allow to spin for 2 min.9.9 Remove the OLHW tube, and decant the separatedliquid phase of each to an appropriate waste vessel.9.9.1 Visually estimate and record the amount of centr
24、i-fuged solids in the tubes to the nearest 0.25 mL.10. Quality Control10.1 Each laboratory using this test method will operate aformal quality control program. This program shall includeelements that address analyst proficiency through the evalua-tion of method blanks, duplicates, and reference mate
25、rials ifavailable.11. Calculation11.1 The estimated amount of solid material is calculated asfollows:A/10mL! 100 5 Insoluble solids, percent (3)where:A = volume of solids from centrifuge tube.12. Precision and Bias12.1 PrecisionThe precision of this test method is beingdetermined.12.2 BiasThe bias o
26、f this test method has not beendetermined because there are no recognized reference materi-als.13. Keywords13.1 centrifuge; hazardous waste; insoluble solids; organicliquid hazardous waste; suspended solidsASTM International takes no position respecting the validity of any patent rights asserted in
27、connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the res
28、ponsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive caref
29、ul consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International
30、, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the AS
31、TM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ Chemicals, American Chemical Society Specifications , AmericanChemical Society, Washington, DC. For suggestions on the testing of reagents notlisted by the American Chemical Society, see Analar Standards for LaboratoryChemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeiaand National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,MD.D6050 09 (2016)2
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