1、Designation: D 6050 09Standard Test Method forDetermination of Insoluble Solids in Organic LiquidHazardous Waste1This standard is issued under the fixed designation D 6050; 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.1. Scope1.1 This test method covers the determination of the ap-proximate amount of insoluble, suspended solid material inorgani
3、c 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
4、 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 prior to use.2. Refe
5、renced 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 phase of the OLHW
6、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 s
7、olidmaterial 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 alsodecrease the qua
8、lity and consistency of commingled solutionsby decreasing the effectiveness of agitation in storage tanks.These issues are of concern to the recycling industries (sol-vents, paints, and other materials handled in significant quan-tities) in addition to those activities that propose to use thewaste a
9、s a fuel.5. Apparatus5.1 CentrifugeCapable of spinning two or more centri-fuge tubes at a speed controlled to give a relative centrifugalforce of between 1200 to 1400. The speed to achieve this isgenerally between 3100 to 3600 rpm. The rotation speednecessary to achieve the relative centrifugal forc
10、e can bedetermined from one 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 whenthe tubes are in rotating posi
11、tion.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 Acentrifuge tub
12、es 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 specificatio
13、ns of the Committee on1This 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, 2009. Published May 2009. Originallyapproved in 1997. Last previous edition appr
14、oved in 2003 as D 6050 97(2003)1.2Withdrawn. The approved version of this historical standard is referenced onwww.astm.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Analytical Reagents of the American Chemical Society wheresuch
15、 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 solvent blend based on the “ave
16、rage” 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 be as simple as a singlecompon
17、ent (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 samplematerial is to be commingled wi
18、th. 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 withdrawing a portion fortesting.8. Cali
19、bration 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 tube to the 10-mL graduation mar
20、k 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. Closethe centrifuge lid and engage s
21、afety 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 an appropriate waste vessel.9.
22、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 mixing.9.7 Replace the OLHW tube in
23、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 centri-fuged solids in the tubes to
24、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 materials ifavailable.11. Calculati
25、on11.1 The estimated amount of solid material is calculated asfollows:A/10 mL! 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 of this test method has not bee
26、ndetermined 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 connection with any item menti
27、onedin 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 responsible technical committee a
28、nd 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 careful consideration at a meeting
29、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, 100 Barr Harbor Drive, PO Bo
30、x 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 ASTM website(www.astm.org).3Reag
31、ent 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.D6050092
