1、Designation:D833220Standard Practice forCollection of Water Samples with High,Medium,or LowSuspended Solids for Identification and Quantification ofMicroplastic Particles and Fibers1This standard is issued under the fixed designation D8332;the number immediately following the designation indicates t
2、he 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 practice provides for the collection of watersample
3、s with high,medium,or low suspended solids todetermine the presence,count,polymer type,and physicalcharacteristics of microplastic particles and fibers.This collec-tion practice has been validated for the collection of samplesfrom drinking water,surface waters,wastewater influent andeffluent(seconda
4、ry and tertiary),and marine waters.Thispractice is not limited to these particular water matrices;however,the applicability of this practice to other aqueousmatrices must be demonstrated.1.2 Water samples are passed through filters or sieves ofadequate mesh size to enable capture of the smallest des
5、iredparticle size.For waters with high or medium suspended solidscontent,a series of sieves with increasingly smaller mesh sizeshould be used to prevent clogging and allow for the collectionof desired particle size fractions.1.3 Subsequent sample preparation followed by analysisutilizing either Pyro
6、lysis gas chromatography/mass spectrom-etry(Py-GC/MS),IR spectroscopy,or Raman spectroscopymay be used to identify the quantity(mass or number count)and composition(polymer type)of microplastic particles/fibers.The spectroscopic methods can provide a count of thenumber of particles and fibers presen
7、t in a sample,andPy-GC/MS can provide the mass present in a sample.Whendesired,microplastic particle/fiber size,shape and surfacecharacteristics can be ascertained with appropriate instrumentssuch as a scanning electron microscope(SEM).1.4 UnitsThe values stated in SI units are to be regardedas the
8、standard except where standard U.S.equipment isspecified in imperial units,for example,inches and gallons.Noother units of measurement are included in this standard.1.5 Standard PracticeThis practice offers a set of instruc-tions for performing one or more specific operations.Thispractice cannot rep
9、lace education or experience and should beused in conjunction with professional judgment.Not all aspectsof this practice may be applicable in all circumstances.Thispractice is not intended to represent or replace the standard ofcare by which the adequacy of a given professional servicemust be judged
10、,nor should this practice be applied withoutconsideration of a projects many unique aspects.1.6 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 environm
11、ental practices and deter-mine the applicability of regulatory limitations prior to use.1.7 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,
12、Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D883 Terminology Relating to PlasticsD1193 Specification for Reagent Water3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this sta
13、ndard,refer toTerminology D883.3.2 Definitions of Terms Specific to This Standard:3.2.1 effluent,nany stage of treated wastewater.3.2.2 influent,nraw sewage entering a wastewater treat-ment facility.3.2.3 microplastic,nany solid,synthetic organic poly-meric material to which chemical additives or ot
14、her substancesmay have been added,which are particles 5 mm in their1This practice is under the jurisdiction of ASTM Committee D19 on Water andis the direct responsibility of Subcommittee D19.06 on Methods for Analysis forOrganic Substances in Water.Current edition approved July 15,2020.Published Aug
15、ust 2020.DOI:10.1520/D8332-20.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Bar
16、r 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.largest dimension,and fibers no longer than 15 mm in lengthwith an aspect ratio of at least 30:1 and 500 m in its
