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Showing 1-14 of 14 results
Differentiation of Escherichia coli from coliforms
Sigma-Aldrich.com presents an article concerning Differentiation of Escherichia coli from coliforms.
Ultrapure Water for Determination of Toxic Elements in Environmental Analyses
In this paper, the importance of reagent water quality for toxic element environmental analyses is discussed.
Analytical Method: Urea in Water and Wastewater, Enzymatic Determination
Urea in water and wastewater, enzymatic determination - Photometric determination using the indophenol blue method after cleavage of the urea
Food for thought: EN ISO 11133:2014
The new EN ISO 11133:2014 quality-assured culture media for food and water testing to enhance consumer safety. The ultimate aim of the new standard is to further improve the safety of the food and beverage products we consume.
Salmonella Contamination and Testing
Salmonella pass through the entire food chain from animal feed, primary production, and into households or food-service establishments.
EN ISO 11133 and Water for the Preparation and Performance Testing of Microbiological Culture Media
See how two water sources compare when preparing and performance testing microbiological culture media acc. to EN ISO 11133: DI water vs. pure water from a Milli-Q® IX system were assessed. Tests included media specific for Listeria and Salmonella pathogens.
Screening for Estrogen Active Nonylphenols in Water by Planar Solid Phase Extraction – Planar Yeast Estrogen Screen
Nonylphenols (NP) are ubiquitous substances that have been detected in highly diverse foodstuff. As breakdown products of nonylphenol ethoxylates, NP could end up in the aquatic environment. This article presents a rapid method for NP detection in surface water...
PFAS Testing Methods and Guidance for Sample Filtration
Validation of Millex® PES syringe filters in PFAS testing of water samples using EPA method 537.1.
Pseudomonas Media and Tests
An article concerning the detection, identification, differentiation, and cultivation of Pseudomonas species.
Safe Drinking Water Act & Clean Water Act – What is it?
The Safe Drinking Water Act reflects the primary drinking water regulation. Drinking water here means finished drinking water from the plant and the distribution lines. But the Safe Drinking Water Act covers also the ground water sources for raw water...
New Revised ISO 17995 Water Quality
New Revised ISO 17995 Water Quality
Detection of Listeria monocytogenes in Food and Environmental Samples
Detection of Listeria monocytogenes in food and environmental samples according to ISO 11290-1, FDA-BAM and USDA-FSIS
EN ISO 11133:2014 Quality-assured Culture Media for Food and Water Testing to Enhance Consumer Safety
EN ISO 11133:2014 - Mandatory standard for media preparation, production, storage and performance testing. In May 2014, the International Organization for Standardization (ISO) published the revised EN ISO 11133, which is now a full standard and as such, mandatory for...
LC-MS Analysis of Hormones in Tap Water
Three hormones were detected by LC-MS/MS in the tap water of different laboratories. After purification by Milli-Q® water purification systems, the hormones were no longer detected in the product ultrapure water.