Detail of GB/T 31402-2015

Introduction of GB/T 31402-2015

Plastics - Measurement of antibacterial activity on plastics surfaces 1 Scope This standard specifies a method of evaluating the antibacterial activity of antibacterial-treated plastic products (including intermediate products). Note: It may also be applicable to the antibacterial activity inspection of other antibacterial-treated non-porous materials. It is not intended to be used to evaluate the effects and propagation of bacteria on plastics without antibacterial treatments. ISO 846 describes tests to evaluate the effects and propagation of bacteria on plastics, which are different from those covered by this standard. Those who are interested are referred to ISO 846: 1997, method C. Secondary effects of antibacterial treatments, such as the prevention of biodeterioration and odour, are not covered by this standard, which is not intended to be used or referenced as a method to document or claim biodegradability of plastics. For biodegradation, refer to ISO 14851, ISO 14852 and ISO 14855 (see the Bibliography) and related standards. This standard does not concern plastic building materials, such as PVC or composites, unless they act in the same way as treated articles. Any results obtained with this standard should always refer to this standard and the conditions used. Results obtained with this standard 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., have to be considered. A minimum diffusion of the antibacterial agents (chemicals) into the test inoculum is necessary with this method. It is recommended that workers consult ISO 7218. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 7218 Microbiology of food and animal feeding stuffs - General requirements and guidance for microbiological examinations 3 Terms and definitions For the purpose of this document, the following terms and definitions apply. 3.1 antibacterial term describing a state where growth of bacteria on the surfaces of products is suppressed or describing the effect of an agent which suppresses the growth of bacteria on the surfaces of products 3.2 antibacterial agent agent that inhibits the growth of bacteria on the surfaces of products by the use of an antibacterial surface treatment or a compounded agent

Contents of GB/T 31402-2015

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Materials 5 Apparatus 6 Sterilization of apparatus and storage of stock cultures 7 Procedure 8 Expression of results 9 Repeatability and reproducibility 10 Test report Annex A (Normative) Quality of biological materials Annex B (Informative) Repeatability and reproducibility Bibliography