ASTM E723-13
(Practice)Standard Practice for Evaluation of Antimicrobials as Preservatives for Aqueous-Based Products Used in the Paper Industry (Bacterial Spoilage)
Standard Practice for Evaluation of Antimicrobials as Preservatives for Aqueous-Based Products Used in the Paper Industry (Bacterial Spoilage)
SIGNIFICANCE AND USE
5.1 This practice should be used to determine if an antimicrobial preserves pigment suspensions, dye solutions, pulp slurries, starch solutions, polymers, sizing agents, latex emulsions, and other aqueous-based materials used in the paper industry from bacterial spoilage.Note 1—Control of fungal spoilage of similar products can be evaluated by Test Method E875.Note 2—Slimicides for control of fungal or bacterial slime can be evaluated by Test Method E1839.
SCOPE
1.1 This laboratory practice is used to determine the efficacy of an antimicrobial for preventing bacterial spoilage of in-process aqueous-based products used in the paper industry. For information on fungal spoilage, see Test Method E875. This practice should be performed by persons who have had basic microbiological training.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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 and health practices and determine the applicability of regulatory limitations prior to use. (See 40 CFR Part 160.)
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Designation: E723 − 13
Standard Practice for
Evaluation of Antimicrobials as Preservatives for Aqueous-
Based Products Used in the Paper Industry (Bacterial
1
Spoilage)
This standard is issued under the fixed designation E723; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope E2756Terminology Relating toAntimicrobial andAntiviral
Agents
1.1 Thislaboratorypracticeisusedtodeterminetheefficacy
2.2 Other Standards:
of an antimicrobial for preventing bacterial spoilage of in-
3
40 CFR Part 160Good Laboratory Practice Standards
processaqueous-basedproductsusedinthepaperindustry.For
information on fungal spoilage, see Test Method E875. This
3. Terminology
practice should be performed by persons who have had basic
microbiological training. 3.1 For definitions of terms related to this practice, see
Terminology E2756.
1.2 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this 3.2 Definitions of Terms Specific to This Standard:
standard. 3.2.1 antimicrobial, n—chemicalorphysicalagentthatkills
or inactivates microorganisms or suppresses their growth or
1.3 This standard does not purport to address all of the
reproduction.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- 3.2.2 bactericide, n—a physical or chemical agent that kills
priate safety and health practices and determine the applica- bacteria, but not necessarily bacterial spores.
bility of regulatory limitations prior to use. (See 40 CFR Part
3.2.3 biocide, n—a physical or chemical agent that kills
160.)
organisms.
3.2.4 microbicide, n—aphysicalorchemicalagentthatkills
2. Referenced Documents
microorganisms.
2
2.1 ASTM Standards:
3.2.5 preservatives, n—chemicalagent(s)addedtoaproduct
D1193Specification for Reagent Water
to reduce or prevent microbial growth.
E640Test Method for Preservatives in Water-Containing
Cosmetics
4. Summary of Practice
E875Test Method for Efficacy of Fungal ControlAgents as
4.1 Aqueous material to be preserved is inoculated with
Preservatives for Aqueous-Based Products Used in the
appropriate bacterial inoculums followed by addition of a
Paper Industry
bactericidethatwillreducepopulationsofbacteriaandprevent
E1054Test Methods for Evaluation of Inactivators of Anti-
thegrowthofsurvivorsforaspecifiedperiodoftime.Bacterial
microbial Agents
numbers in the sample are determined at various time periods
E1326GuideforEvaluatingNonconventionalMicrobiologi-
and compared to a contol without any bactericide. The proper
cal Tests Used for Enumerating Bacteria
level of antimicrobial is one that reduces and keeps the
E1839Test Method for Efficacy of Slimicides for the Paper
organisms to an acceptable level in the test material.
Industry—Bacterial and Fungal Slime
5. Significance and Use
1
This practice is under the jurisdiction ofASTM Committee E35 on Pesticides,
5.1 This practice should be used to determine if an antimi-
Antimicrobials, and Alternative Control Agents and is the direct responsibility of
Subcommittee E35.15 on Antimicrobial Agents.
crobial preserves pigment suspensions, dye solutions, pulp
Current edition approved April 1, 2013. Published May 2013. Originally
slurries, starch solutions, polymers, sizing agents, latex
approved in 1980. Last previous edition approved in 2007 as E723–07. DOI:
10.1520/E0723-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
Standards volume information, refer to the standard’s Document Summary page on 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
the ASTM website. www.access.gpo.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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E723 − 13
emulsions,andotheraqueous-basedmaterialsusedinthepaper 7.3 Test Materials—Freshly prepared pigment slurries,
industry from bacterial spoilage. adhesives, dye rosin, polymer, sizing solutions, and other
materials to be preserved should be used as the substrate.
NOTE 1—Control of fungal spoilage of similar products can be
evaluated by Test Method E875.
7.4 Culture Medium:
NOTE 2—Slimicides for control of fungal or bacterial slime can be
7.4.1 Standard dehydrated tryptone glucose extract agar or
evaluated by Test Method E1839.
other medium that is known to recover organisms from the
material to be tested is recommende
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This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
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: E723 − 07 E723 − 13
Standard Test Method Practice for
EfficacyEvaluation of Antimicrobials as Preservatives for
Aqueous-Based Products Used in the Paper Industry
1
(Bacterial Spoilage)
This standard is issued under the fixed designation E723; 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 laboratory test method is used to determine the efficacy of an antimicrobial for preventing bacterial spoilage of
in-process aqueous-based products used in the paper industry. For information on fungal spoilage, see Test Method E875. This test
method should be performed by persons who have had basic microbiological training.
1.2 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D1193 Specification for Reagent Water
E875 Test Method for Efficacy of Fungal Control Agents as Preservatives for Aqueous-Based Products Used in the Paper
Industry
E1054 Test Methods for Evaluation of Inactivators of Antimicrobial Agents
E1326 Guide for Evaluating Nonconventional Microbiological Tests Used for Enumerating Bacteria
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 antimicrobial, n—chemical or physical agent that kills or inactivates microorganisms or suppresses their growth or
reproduction.
3.1.2 bactericide, n—a physical or chemical agent that kills bacteria, but not necessarily bacterial spores.
3.1.3 preservatives, n—a chemical agent(s) added to a product to reduce or prevent microbial growth.
4. Summary of Test Method
4.1 Aqueous material to be preserved is inoculated with an appropriate bacterial inoculum followed by addition of a bactericide
that will reduce populations of bacteria and prevent the growth of survivors for a specified period of time. Bacterial numbers in
the sample are determined at various time periods and compared to a contol without any bactericide. The proper level of
antimicrobial is one that reduces and keeps the organisms to an acceptable level in the test material.
5. Significance and Use
5.1 This test method should be used to determine if an antimicrobial preserves pigment suspensions, dye solutions, pulp slurries,
starch solutions, polymers, sizing agents, latex emulsions, and other aqueous-based materials used in the paper industry from
bacterial spoilage.
1
This test method practice is under the jurisdiction of ASTM Committee E35 on Pesticides, Antimicrobials, and Alternative Control Agents and is the direct responsibility
of Subcommittee E35.15 on Antimicrobial Agents.
Current edition approved April 1, 2007April 1, 2013. Published April 2007May 2013. Originally approved in 1980. Last previous edition approved in 20022007 as
E723 – 97 (2002).E723 – 07. DOI: 10.1520/E0723-07.10.1520/E0723-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
E723 − 13
6. Apparatus
6.1 Balance—Two balances: one should be sensitive to 0.1 g at a load of 200 g and have a platform to accommodate bottles
being used in the test. The second balance (analytical) should be sensitive to 0.1 mg and should be employed to weigh the candidate
preservative to be used in the preparation of the stock solutions.
6.2 Bottles—Borosilicate glass milk dilution bottles or other suitable containers fitted either with screw caps or Escher rubber
stoppers. These bottles are used for water blanks and aqueous-based samples.
6.3 Colony Counter—Any one of several types may be used as the Quebec, Buck, and Wolfhuegel. A hand tally for the recording
of the bacterial count is recommended if manual counting is done. Alternatively, an automated video colony counter may also be
used.
6.4 Culture Tube Closures—Appropriate nontoxic closures should be selected.
6.5 Culture Tubes—Recommende
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