ISO 22196 is an antimicrobial surface test that measures antibacterial activity on plastic and other non-porous surfaces. Based on JIS Z 2801, ISO 22196 is a surface test commonly used with standard bacteria that can be replaced depending on customer requirements. The ISO 22196 standard test method is designed to test plastic capabilities and other similar materials to kill or prevent the growth of microorganisms during the 24-hour contact period. Standard antimicrobial testing for ISO 22196 opposed both organisms, S. aureus and E. coli.
ISO 22196 is one of the most commonly asked antimicrobial surface test methods to evaluate the antimicrobial activity of antibacterial plastic products, including between products. ISO 22196 for concrete is adapted to test antimicrobial performance from concrete treated and not treated. Antimicrobial plastic can meet ISO 22196 requirements. However, when conditioned in a simulation environment, the treated plastic may not continue to work as referred to. It is important to incorporate environmental conditions in testing, such as UV exposure, moisture, and release agents that can affect the efficacy of antimicrobial plastic. ISO 22196 test strength
Weakness of the ISO 22196 test The ISO 22196 method does not necessarily represent the actual surface contamination event. The relatively dilute liquid microbial inoculum is spread over a large enough surface area and then wet guarded (usually for 24 hours). Most of the time, microbial contaminants dries quickly to the surface. It limits the time that juicy media is available to facilitate the interaction between antimicrobial surfaces and microorganisms. This means that ISO 22196 is a "best case" test type for many products. Also read - What is ISO 18184 testing? Here is all you need to know about it.
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