Standard Test Method for Determining the Initial Efficiency of Materials to Penetration by Particulates Using Latex Spheres

SIGNIFICANCE AND USE
5.1 This test method measures the initial filtration efficiency of materials by sampling representative volumes of the upstream and downstream latex aerosol concentrations in a controlled airflow chamber.  
5.2 This test method provides specific test techniques for both manufacturers and users to evaluate materials when exposed to aerosol particle sizes between 0.1 and 5.0 μm.  
5.2.1 This test method establishes a basis of efficiency comparison between materials.
SCOPE
1.1 This test method establishes procedures for measuring the initial particle filtration efficiency of materials using monodispersed aerosols.  
1.1.1 This test method utilizes light-scattering particle counting in the size range of 0.1 to 5.0 μm and airflow test velocities of 0.5 to 25 cm/s.  
1.2 The test procedure measures filtration efficiency by comparing the particle count in the feed stream (upstream) to that in the filtrate (downstream).  
1.3 The values stated in SI units or in other units shall be regarded separately as standard. The values stated in each system must be used independently of the other, without combining values in any way.  
1.4 The following precautionary caveat pertains only to the test methods portion, Section 10, of this specification. 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, health, and environmental 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.

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Publication Date
31-Jan-2024
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ASTM F2299/F2299M-24 - Standard Test Method for Determining the Initial Efficiency of Materials to Penetration by Particulates Using Latex Spheres
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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.
Designation: F2299/F2299M − 24
Standard Test Method for
Determining the Initial Efficiency of Materials to Penetration
1
by Particulates Using Latex Spheres
This standard is issued under the fixed designation F2299/F2299M; 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 D2905 Practice for Statements on Number of Specimens for
3
Textiles (Withdrawn 2008)
1.1 This test method establishes procedures for measuring
D3776/D3776M Test Methods for Mass Per Unit Area
the initial particle filtration efficiency of materials using
(Weight) of Fabric
monodispersed aerosols.
F50 Practice for Continuous Sizing and Counting of Air-
1.1.1 This test method utilizes light-scattering particle
borne Particles in Dust-Controlled Areas and Clean
counting in the size range of 0.1 to 5.0 μm and airflow test
Rooms Using Instruments Capable of Detecting Single
velocities of 0.5 to 25 cm/s.
Sub-Micrometre and Larger Particles
1.2 The test procedure measures filtration efficiency by
F328 Practice for Calibration of an Airborne Particle Coun-
comparing the particle count in the feed stream (upstream) to
ter Using Monodisperse Spherical Particles (Withdrawn
that in the filtrate (downstream). 3
2007)
F778 Methods for Gas Flow Resistance Testing of Filtration
1.3 The values stated in SI units or in other units shall be
regarded separately as standard. The values stated in each Media
F1494 Terminology Relating to Protective Clothing
system must be used independently of the other, without
combining values in any way. F2053 Guide for Documenting the Results of Airborne
Particle Penetration Testing of Protective Clothing Mate-
1.4 The following precautionary caveat pertains only to the
rials
test methods portion, Section 10, of this specification. This
standard does not purport to address all of the safety concerns,
3. Terminology
if any, associated with its use. It is the responsibility of the user
3.1 Definitions:
of this standard to establish appropriate safety, health, and
3.1.1 aerosol, n—a suspension of a liquid or solid particles
environmental practices and determine the applicability of
in a gas with the particles being in the colloidal size range.
regulatory limitations prior to use.
3.1.1.1 Discussion—In this test method, aerosols include
1.5 This international standard was developed in accor-
solid particles having a diameter of 0.1 to 5 μm suspended or
dance with internationally recognized principles on standard-
dispersed in an airflow at concentrations of less than 102 par-
ization established in the Decision on Principles for the
3
ticles ⁄cm .
Development of International Standards, Guides and Recom-
3.1.2 isokinetic sampling, n—a condition where the velocity
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee. of the airflow entering the sampling nozzle is the same as the
velocity of the airflow passing around the sampling nozzle.
2. Referenced Documents
3.1.3 monodispersion, n—scattering of discrete particles in
2
an airflow where the size is centralized about a specific particle
2.1 ASTM Standards:
size.
D1777 Test Method for Thickness of Textile Materials
3.1.3.1 Discussion—In this test method, the monodispersed
particle distribution has a mean diameter size of the aerosol in
the 0.1 to 5 μm range, with a coefficient of variation of the
1
This test method is under the jurisdiction of ASTM Committee F23 on Personal
mean diameter of 610 % or less, as certified by the manufac-
Protective Clothing and Equipment and is the direct responsibility of Subcommittee
F23.40 on Biological.
turer.
Current edition approved Feb. 1, 2024. Published February 2024. Originally
3.2 For definitions of other protective clothing-related terms
approved in 2003. Last previous edition approved in 2017 as F2299/F2299M – 03
(2017). DOI: 10.1520/F2299_F2299M-24.
used in this test method, refer to Terminology F1494.
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
3
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
F2299/F2299M − 24
4. Summary of Test Me
...

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: F2299/F2299M − 03 (Reapproved 2017) F2299/F2299M − 24
Standard Test Method for
Determining the Initial Efficiency of Materials Used in
Medical Face Masks to Penetration by Particulates Using
1
Latex Spheres
This standard is issued under the fixed designation F2299/F2299M; 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 establishes procedures for measuring the initial particle filtration efficiency of materials used in medical
facemasks using monodispersed aerosols.
1.1.1 This test method utilizes light scattering light-scattering particle counting in the size range of 0.1 to 5.0 μm and airflow test
velocities of 0.5 to 25 cm/s.
1.2 The test procedure measures filtration efficiency by comparing the particle count in the feed stream (upstream) to that in the
filtrate (downstream).
1.3 The values stated in SI units or in other units shall be regarded separately as standard. The values stated in each system must
be used independently of the other, without combining values in any way.
1.4 The following precautionary caveat pertains only to the test methods portion, Section 10, of this specification. 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 healthsafety, health, and environmental 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
2.1 ASTM Standards:
D1356 Terminology Relating to Sampling and Analysis of Atmospheres
D1777 Test Method for Thickness of Textile Materials
3
D2905 Practice for Statements on Number of Specimens for Textiles (Withdrawn 2008)
D3776/D3776M Test Methods for Mass Per Unit Area (Weight) of Fabric
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
1
This test method is under the jurisdiction of ASTM Committee F23 on Personal Protective Clothing and Equipment and is the direct responsibility of Subcommittee
F23.40 on Biological.
Current edition approved June 1, 2017Feb. 1, 2024. Published June 2017February 2024. Originally approved in 2003. Last previous edition approved in 20102017 as
F2299/F2299M – 03 (2010).(2017). DOI: 10.1520/F2299_F2299M-03R17.10.1520/F2299_F2299M-24.
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.
3
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
1

---------------------- Page: 1 ----------------------
F2299/F2299M − 24
F50 Practice for Continuous Sizing and Counting of Airborne Particles in Dust-Controlled Areas and Clean Rooms Using
Instruments Capable of Detecting Single Sub-Micrometre and Larger Particles
3
F328 Practice for Calibration of an Airborne Particle Counter Using Monodisperse Spherical Particles (Withdrawn 2007)
F778 Methods for Gas Flow Resistance Testing of Filtration Media
3
F1471 Test Method for Air Cleaning Performance of a High-Efficiency Particulate Air Filter System (Withdrawn 2018)
F1494 Terminology Relating to Protective Clothing
F2053 Guide for Documenting the Results of Airborne Particle Penetration Testing of Protective Clothing Materials
3. Terminology
3.1 Definitions:
3.1.1 aerosol, n—a suspension of a liquid or solid particles in a gas with the particles being in the colloidal size range.
3.1.1.1 Discussion—
In this test method, aerosols include solid particles having a diameter of 0.1 to 5 μm suspended or dispersed in an airflow at
3
concentrations of less than 102 particles ⁄cm .
3.1.2 isokinetic sampling, n—a condition where the velocity of the airflow entering the sampling nozzle is the same as the veloci
...

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