ISO 9998:1991 PDF Download

ISO 9998:1991 is a standard that focuses on water quality, specifically the evaluation and control of microbiological colony count media used in water quality tests. The standard provides a method for comparing and evaluating the same medium prepared from different lots of materials, as well as different media used for the same purpose. It aims to ensure consistency and accuracy in water quality testing by establishing criteria for the selection and use of colony count media.

The standard includes Annexes A and B, which are integral parts of the standard. These annexes likely provide additional guidance, procedures, or specific requirements related to the evaluation and control of microbiological colony count media. The overall goal of ISO 9998:1991 is to promote standardized practices in evaluating and controlling microbiological colony count media, thereby enhancing the reliability and comparability of water quality test results.