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BS ISO 22551:2020 Fine ceramics (advanced ceramics, advanced technical ceramics). Determination of bacterial reduction rate by semiconducting photocatalytic materials under indoor lighting environment. Semi-dry method for estimating antibacterial activity >
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BS ISO 22551:2020 Fine ceramics (advanced ceramics, advanced technical ceramics). Determination of bacterial reduction rate by semiconducting photocatalytic materials under indoor lighting environment. Semi-dry method for estimating antibacterial activity, 2020
- undefined
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Principle
- 5 Materials
- 5.1 Bacteria strains and preparation for tests
- 5.1.1 Bacteria strains
- 5.1.2 Subculture of bacteria strains
- 5.2 Chemicals and implements
- 5.2.1 Dispersion medium for Staphylococcus epidermidis
- 5.2.2 Dispersion medium for Escherichia coli
- 5.2.3 1/5-concentration nutrient broth medium (1/5 NB)
- 5.2.4 1/2-concentraion luris-bertani broth medium (1/2 LB)
- 5.2.5 Nutrient agar medium (NA medium)
- 5.2.6 Soybean-casein digest broth with lecithin and polysorbate 80 (SCDLP medium)
- 6 Apparatus
- 7 Test piece
- 8 Procedure
- 8.1 Preparation of test bacterial solution
- 8.1.1 Culturing of test bacteria
- 8.1.2 Preparation of test bacterial solution
- 8.2 Application of test bacterial solution
- 8.2.1 Measurement of test piece mass
- 8.2.2 Application of test bacterial solution
- 8.2.3 Direct application method
- 8.3 Indoor lighting condition
- 8.3.1 Measurement of luminance and preparation of setting position of test pieces
- 8.3.2 Light exposure time
- 8.3.3 Test pieces inoculated with test bacterial solution under light condition
- 8.3.4 Test pieces inoculated with test bacterial solution under dark condition
- 8.4 Measurement of number of living bacteria
- 8.4.1 Washout of inoculated bacteria
- 8.4.2 Measurement of bacterial concentration in washout solution
- 8.4.3 Measurement of bacterial concentration in test bacterial solution
- 9 Calculation
- 9.1 General
- 9.2 Test requirement fulfilment validation
- 9.3 Calculation of reduction rate of living bacteria
- 10 Test report
- Bibliography [Go to Page]