ContentsPage12Normative references ..............................................63Terms and definitions ..................................................65.1General. ...5.1.1Materials and construction. .... 85.2Performance requirements. ...5.2.1 General.. ..85.2.2 Bacterial filtration efficiency (BFE)5.2.3 Breathability. ..5.2.4 Splash resistance ... ..85.2.5 Microbial cleanliness (Bioburden)5.2.6 Biocompatibility.5.2.7 Summary of performance requirements ....Marking, labelling and packaging ....... ..Annex B (normative] Method for in vitro determination of bacterial filtration efficiency(BFE) , 12B.1General.. 12B.2Principle. 12B.3Reagents and materials. 12B.3.1 General. 2B.3.2 Tryptic soy agar. 12B.3.3 Tryptic soy broth. 12B.3.4 Peptone water. 13B.3.5 Culture of Staphylococcus aureus ATCC 6538, growing on tryptic soy agar sla........ 13B.4Test apparatus. 13B.4.1 Six stage cascade impactor, the arrangement is specified in Table B.1. ..............13 B.4.2 Nebulizer, capable of delivering particles with a mean size of (3,0士0,3) um when inB.4.3 Aerosol chamber, glass, 600 mm long and 80 mm in external da...............13 B.4.4 Flow meters, capable of measuring a flow rate of 28,3 1/ min.B.4.5 Pressure gauge, capable of measuring a pressure of 35 kPa to an accuracy of士1 kPa. ...13
Contents<br>Page<br>1<br>2Normative references ..............................................6<br>3Terms and definitions ..................................................6<br>5.1General. ...<br>5.1.1Materials and construction. .... 8<br>5.2Performance requirements. ...<br>5.2.1 General.. ..8<br>5.2.2 Bacterial filtration efficiency (BFE)<br>5.2.3 Breathability. ..<br>5.2.4 Splash resistance ... ..8<br>5.2.5 Microbial cleanliness (Bioburden)<br>5.2.6 Biocompatibility.<br>5.2.7 Summary of performance requirements ....<br>Marking, labelling and packaging ....... ..<br>Annex B (normative] Method for in vitro determination of bacterial filtration efficiency<br>(BFE) , 12<br>B.1General.. 12<br>B.2Principle. 12<br>B.3Reagents and materials. 12<br>B.3.1 General. 2<br>B.3.2 Tryptic soy agar. 12<br>B.3.3 Tryptic soy broth. 12<br>B.3.4 Peptone water. 13<br>B.3.5 Culture of Staphylococcus aureus ATCC 6538, growing on tryptic soy agar sla........ 13<br>B.4Test apparatus. 13<br>B.4.1 Six stage cascade impactor, the arrangement is specified in Table B.1. ..............13 B.4.2 Nebulizer, capable of delivering particles with a mean size of (3,0士0,3) um when in<br>B.4.3 Aerosol chamber, glass, 600 mm long and 80 mm in external da...............13 B.4.4 Flow meters, capable of measuring a flow rate of 28,3 1/ min.<br>B.4.5 Pressure gauge, capable of measuring a pressure of 35 kPa to an accuracy of士1 kPa. ...13
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