SS 669-4:2020
Medical face masks – Part 4 : Standard test method for evaluating the bacterial filtration efficiency (BFE) of medical face mask materials, using a biological aerosol of Staphylococcus aureus
OVERVIEW
1.1 This test method is used to measure the bacterial filtration efficiency (BFE) of medical face mask materials, employing a ratio of the upstream bacterial challenge to downstream residual concentration to determine filtration efficiency of medical face mask materials.
1.2 This test method is a quantitative method that allows filtration efficiency for medical face mask materials to be determined. The maximum filtration efficiency that can be determined by this method is 99.9 %.
1.3 This test method does not apply to all forms or conditions of biological aerosol exposure.
1.4 This test method evaluates medical face mask materials as an item of protective clothing but does not evaluate materials for regulatory approval as respirators.
1.5 Units—The values stated in SI units or inch-pound units are to be regarded separately as standard.
1.6 This test method does not address breathability of the medical face mask materials or any other properties affecting the ease of breathing through the medical face mask material.
1.7 This test method may also be used to measure the bacterial filtration efficiency (BFE) of other porous medical products such as surgical gowns, surgical drapes, and sterile barrier systems.
COMMENTS
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PRODUCT DETAILS
| Status | Current |
|---|---|
| Edition | 2020 |
| No. of Pages | 15 |
| ICS Classification | 11.140 Hospital equipment |
| Committee | Biomedical and Health Standards Committee |
| Available for Purchase | For sale in Singapore only |
| Adoption | ASTM F2101-19 : 2019 IDT |