ISO 22551:2020标准是一项针对细陶瓷（高级陶瓷、高级技术陶瓷）中的光催化材料的测定方法。该标准旨在评估光催化材料在室内照明环境下对细菌减少率的能力。该标准采用半干法来评估光催化材料在实际环境细菌污染表面上的抗菌活性。

该标准的主要内容包括：样品的准备、实验条件的设定、实验步骤的描述、数据处理和结果的报告等。在实验过程中，需要使用一定数量的细菌，将其涂布在样品表面，然后在室内照明环境下进行光催化反应。通过测量细菌的减少率，可以评估光催化材料的抗菌活性。

该标准的应用范围包括：细陶瓷、高级陶瓷、高级技术陶瓷等领域。该标准的实施可以帮助企业评估其产品的抗菌性能，提高产品的质量和竞争力。

相关标准
ISO 27447:2019 Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for antibacterial activity of semiconducting photocatalytic materials under indoor lighting environment
ISO 27448:2019 Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for antibacterial activity of semiconducting photocatalytic materials under outdoor natural sunlight
ISO 27449:2019 Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for antibacterial activity of semiconducting photocatalytic materials under UV irradiation
ISO 27450:2019 Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for antibacterial activity of semiconducting photocatalytic materials under visible light irradiation
ISO 27451:2019 Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for antibacterial activity of semiconducting photocatalytic materials under dark condition