BS ISO 22551:2020
$102.76
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 on the actual environmental bacteria contamination surface
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 22 |
This document establishes a test method for determining the antibacterial activity of materials containing an indoor-light-active photocatalytic material on the surface. The antibacterial reduction rate is determined by measuring the survival of bacteria after illumination with indoor light. This test assumes a surface with high potential of possible person contact with bacteria. This test is designed to evaluate the suppression of contact infection of bacteria using an indoor-light-active photocatalytic material under indoor lighting environment.
It is intended for use with different kinds of indoor-light-active photocatalytic materials used in construction, for example, flat sheets, board or plate shapes, which are the basic forms of materials for various applications. It is not applicable to powder, granular, or porous indoor-light-active photocatalytic materials, as well as cloths or textiles.
It is applicable to indoor-light-active photocatalytic materials produced for antibacterial application. Other types of indoor-light-active photocatalytic materials applications, i.e. decomposition of water contaminants, self-cleaning, antifogging, and air purification, are non-applicable by this method.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 6 | Foreword |
| 7 | Introduction |
| 9 | 1 Scope 2 Normative references 3 Terms and definitions |
| 10 | 4 Principle 5 Materials 5.1 Bacteria strains and preparation for tests 5.1.1 Bacteria strains |
| 11 | 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) |
| 12 | 5.2.5 Nutrient agar medium (NA medium) 5.2.6 Soybean-casein digest broth with lecithin and polysorbate 80 (SCDLP medium) 6 Apparatus |
| 13 | 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 |
| 14 | 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 |
| 15 | 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 |
| 16 | 9 Calculation 9.1 General 9.2 Test requirement fulfilment validation |
| 17 | 9.3 Calculation of reduction rate of living bacteria |
| 18 | 10 Test report |
| 20 | Bibliography |
