1、Designation:D778912(Reapproved 2021)Standard Practice forCollection of Fungal Material from Surfaces by Swab1This standard is issued under the fixed designation D7789;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last r
2、evision.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 The purpose of this practice is to describe the proce-dures for collection of surface samples using sterile swabs.1.2 The purpose
3、 of this practice is to support the fieldinvestigator in differentiating fungal materials from non-fungalmaterial such as scuffs,soot deposits,stains,pigments,dust,efflorescence,adhesives,dust,and water stains.1.3 This practice does not address building occupantexposures,or occupant health risks.1.4
4、 The samples collected by this practice are appropriatefor culture,direct microscopy,and biochemical analysis,orcombination thereof.1.5 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
5、 appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for th
6、eDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1356 Terminology Relating to Sampling and Analysis ofAtmospheresD6044 Guide for Representative Sampling for M
7、anagementof Waste and Contaminated Media3.Terminology3.1 Definitions:3.1.1 sample,na portion of a population intended to berepresentative of the whole.a portion of a population.Aportionof material that is taken for testing or record purposes.D60443.1.2 sampling,na process consisting of the withdrawa
8、l orisolation of a fractional part of the whole.D13563.2 Definitions of Terms Specific to This Standard:3.2.1 area(surface,sampled),na defined,measured ex-tent of surface sampled.3.2.2 biochemical analysis,nact of assessing chemicalsubstances(that is,chitin,enzyme activity,ergosterol,mycotoxin,DNA)o
9、riginating from living or dead organisms.3.2.3 chain of custody(COC),na document that providesfor the traceable transfer of field samples to the analyticallaboratory.It may or may not be combined with the field datasheet.3.2.4 culture analysis,nact of assessing microorganisms(if present)capable of g
10、rowing on selected media underartificial and controlled conditions.3.2.5 direct microscopy analysis,nact of assessing micro-organisms(if present)using an optical compound microscope.3.2.6 field data sheet,na record of varying names thatprovides a reference document for information directly relatedto
11、 the sample collection event,including pre-and post-calibration data.3.2.7 fungal material,nfungal spores,hyphae and repro-ductive structures.3.2.8 fungi,neukaryotic,heterotrophic,absorptive organ-isms that develop a rather diffuse,branched,tubular body(thatis,network of hyphae)and reproduce by mean
12、s of spores.3Theterms mold and mildew are frequently used by laypersonswhen referring to various fungal colonization.For purposes ofthis practice,these terms have no technical meaning.4.Significance and Use4.1 This practice provides a procedure for collecting surfacematerial using a sterile swab.4.2
13、 A swab sample collected according to this practice isintended to be used to assess fungal material on surfaces.1This practice is under the jurisdiction ofASTM Committee D22 on Air Qualityand is the direct responsibility of Subcommittee D22.08 on Assessment,Sampling,and Analysis of Microorganisms.Cu
14、rrent edition approved July 1,2021.Published July 2021.Originally approvedin 2012.Last previous edition approved in 2012 as D7789 12.DOI:10.1520/D7789-12R21.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMSt
15、andards volume information,refer to the standards Document Summary page onthe ASTM website.3Kendrick,B.,The Fifth Kingdom,3rd Edition,1992.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordan
16、ce 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.14.3 A swab sample collected from an area with defineddimensions can be used to quantify fungal material per unitarea or for qualitative analysis.4.4 Aswab sample collected from point(s)of interest can beused for qualitative analysis or to
