ASTM D6050-21

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it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D6050 − 09 (Reapproved 2016) D6050 − 21
Standard Test Method for
Determination of Insoluble Solids in Organic Liquid
Hazardous Waste
This standard is issued under the fixed designation D6050; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers the determination of the approximate amount of insoluble, suspended solid material in organic liquid
hazardous waste (OLHW).
1.2 This test method is intended to be used in approximating the amount of insoluble, suspended solids in determining the material
handling material-handling characteristics and fuel quality of OLHW. It is not intended to replace more sophisticated procedures
for the determination of total solids.
1.3 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this
standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
D96 Test Method for Water and Sediment in Crude Oil by Centrifuge Method (Field Procedure) (Withdrawn 2000)
D5283 Practice for Generation of Environmental Data Related to Waste Management Activities: Quality Assurance and Quality
Control Planning and Implementation
D5681 Terminology for Waste and Waste Management
3. Terminology
3.1 For definitions of terms used in this test method, refer to Terminology D5681.
4. Summary of Test Method
4.1 A 10-mL aliquot of OLHW sample is decanted into a 15-mL graduated centrifuge tube and centrifuged for 3 min. The
This test method is under the jurisdiction of ASTM Committee D34 on Waste Management and is the direct responsibility of Subcommittee D34.01.06 on Analytical
Methods.
Current edition approved Feb. 1, 2016May 1, 2021. Published February 2016May 2021. Originally approved in 1997. Last previous edition approved in 20092016 as
D6050 – 09.D6050 – 09 (2016). DOI: 10.1520/D6050-09R16.10.1520/D6050-21.
Withdrawn. The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6050 − 21
separated liquid phase of the OLHW is decanted into an appropriate waste vessel. The centrifuge tube with the separated solid
material is brought back to its original 10-mL volume with a user-selected blend of clean solvents and agitated to mix the solid
and liquid phases. The tube is centrifuged for 2 min, and the amount of remaining solid material is read.
5. Significance and Use
5.1 A high percentage of insoluble, suspended solid material can create pumping, filtering, or grinding difficulties in the
off-loading of bulk shipments of OLHW and can contribute to excessive wear on processing equipment. High solids can also
decrease the quality and consistency of commingled solutions by decreasing the effectiveness of agitation in storage tanks. These
issues are of concern to the recycling industries (solvents, paints, and other materials handled in significant quantities) in addition
to those activities that propose to use the waste as a fuel.
6. Apparatus
6.1 Centrifuge—Capable of spinning two or more centrifuge tubes at a speed controlled to give a relative centrifugal force of
between 1200 to 1400. The speed to achieve this is generally between 3100 to 3600 rpm. The rotation speed necessary to achieve
the relative centrifugal force can be determined from one of the following equations:
rcf
rpm 5 1335Π(1)
d
rcf
rpm 5 265 (2)
Œ
d
where:
rpm = rotation speed, in revolutions per min,
rcf = relative centrifugal force, and
d = diameter of swing, in mm (Eq 1) or in. (Eq 2), measured between the tips of opposite tubes when the tubes are in rotating
position.
NOTE 1—Eq 1 and Eq 2 are described in Test Method D96.
6.2 Centrifuge Tubes—Centrifuge tubes shall be cone shaped, made of glass or a solvent resistant solvent-resistant plastic or
polymer, have a minimum capacity of 15 mL when filled to volume, and graduated with minimum subdivisions of 0.5 mL. Class
A centrifuge tubes are recommended. If any grade other than Class A is used, refer to theSection 9section on Calibration and
Standardization. .
7. Reagents and Materials
7.1 Purity of Reagents—Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all
reagents conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society, where such
specifications are available. Other grades may be used, providingprovided that it is first ascertained that the reagent is of
sufficiently high purity to permit its use without lessening the accuracy of the determination.
7.2 Clean Solvent Blend—The user should formulate the clean solvent blend based on the “average” normal chemical composition
of the commingled OLHW. The chemical composition of OLHW is usual
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