Technical Information: Selection of Suitable Water for Food Microbial Testing
Milli-Q
ISO 11133 explains the recommended water quality for the preparation of culture media for food microbiological testing.
To ensure accurate results, prevent false positives or false negatives, and avoid contamination, it is essential to carefully select reagents containing water when preparing liquid or solid media. Tap water may contain various impurities that can affect bacterial growth or cause errors in the prepared media. Since water is a major component of the media, the removal of these contaminants from water is crucial for media preparation. The recommended water quality for media preparation is detailed in ISO 11133:2014 ("Microbiology of food, animal feed and water — Preparation, production, storage and performance testing of culture media"). Additionally, ANNEX H discusses troubleshooting for media, citing the use of inappropriate quality of pure water as a cause of incorrect pH, color anomalies, formation of precipitates, and culture inhibition. This technical document explains the ISO 11133 standards and Merck's pure water production systems that meet these criteria.
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- Water that meets the requirements of ISO 11133 - Performance of the Milli-Q IX 7003/05/10/15 pure water production system
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Food Microbial Testing *For more details, please refer to the PDF document or feel free to contact us.
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From research and development of pharmaceuticals to manufacturing and diagnostics, Merck is working to solve various challenges in life sciences in collaboration with the global science community. Merck's products include over 300,000 items, ranging from laboratory pure and ultra-pure water systems to gene editing tools for drug manufacturing, antibodies, cell lines, and end-to-end systems. To realize promising research more quickly and safely, we closely collaborate with customers in academia, the biotechnology industry, and the pharmaceutical industry. Please feel free to contact us for inquiries about our products or if you are interested in raw material supply. Here is the Merck ultra-pure and pure water systems webpage → https://www.merckmillipore.com/LW Here is the Merck life science reagents, raw materials, and analysis webpage → https://www.sigmaaldrich.com/JP/ja
