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BS ISO 17721-2:2021

BS ISO 17721-2:2021

$102.76

Quantitative determination of antibacterial activity of ceramic tile surfaces. Test methods – Ceramic tile surfaces with incorporated photocatalytic antibacterial agents

Published By Publication Date Number of Pages
BSI 2021 18
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This document specifies test methods for evaluating the antibacterial activity of glazed and unglazed ceramic tile surfaces with incorporated photocatalytic antibacterial agents.

Secondary effects on ceramic tile surfaces due to photocatalytic antibacterial treatments, such as changes in chemical resistance, stain resistance or small colour differences, are not covered by this document. For chemical resistance refer to ISO 10545-13 , for stain resistance refer to ISO 10545-14 and for colour differences refer to ISO 10545-16 .

Other types of performance of photocatalytic ceramics, i.e. decomposition of water contaminants, self-cleaning, antifogging and air purification, are not covered by this document. It is also not intended to be used to evaluate ceramic surfaces that have been treated with topical disinfectants or agents that can offer residual activity for limited periods.

Any results obtained with this document will always refer to this document and the conditions used. Results obtained with this document indicate antibacterial activity under the specified experimental conditions used herein, and do not reflect activity under other circumstances where a variety of factors, such as temperature, humidity, different bacterial species, nutrient conditions, etc., are considered.

PDF Catalog

PDF Pages PDF Title
2 National foreword
6 Foreword
7 1 Scope
2 Normative references
3 Terms and definitions
8 4 Materials
4.1 Bacterial strains
4.2 Culture media and solutions
4.2.1 Non-ionic surfactant
4.2.2 Nutrient broth
9 4.2.3 1/500 nutrient broth
4.2.4 Nutrient agar
4.2.5 Soybean-casein digest broth with lecithin and polysorbate 80 (SCDLP)
4.2.6 Phosphate buffer saline (PBS)
5 Test specimen
5.1 Size
10 5.2 Control
5.3 Precondition
5.4 Number of test specimen
6 Procedure
6.1 Preparation of test inoculum
11 6.2 Adhesive film
6.3 Inoculation of test specimens
6.4 Recovery of bacteria from non-treated control specimens at time t = 0 h
6.5 UV irradiation conditions
13 6.6 Dark conditions
6.7 Recovery of bacteria from post irradiation and dark condition test specimens
6.8 Enumeration of viable bacterial count from test specimen washout
14 7 Validation and calculations
7.1 General
7.2 Criteria for a valid test
15 7.3 Calculation of antibacterial activity
8 Test report
17 Bibliography

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BS ISO 17721-2:2021
$102.76