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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.
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.
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
Drinking Water Testing by Ion Chromatography using Ultrapure Water
This study reviews the suitability of ultrapure water for the IC analysis of drinking water. Inorganic ions and disinfectant by-products (DBPs) were assessed.
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
Pseudomonas Media and Tests
An article concerning the detection, identification, differentiation, and cultivation of Pseudomonas species.
New Revised ISO 17995 Water Quality
This second edition of ISO 17995 has been technically revised by the Technical Committee ISO/TC 147, Water quality, Subcommittee SC 4, Microbiological methods, and cancels and replaces the first edition (ISO 17995:2005).
Nitrate in Mineral and Drinking Water
An easy-to-use, economical, and smartphone-based reliable determination of nitrate in mineral and drinking water with Griess reagent.
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
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.
Differentiation of Escherichia coli from coliforms
There are many other methods of detection to indicate the presence of E. coli. Review common tests and biochemical reactions for this contaminant.
LC-MS Analysis of PFAS Compounds in EPA Methods 537.1, 533 and 8327
LC-MS method-based separation and determination of 32 short-chain and long-chain PFAS (Per- and poly-fluoroalkyl substances) compounds from drinking water following 3 EPA methods Method 533, 537, and 537.1. EPA 8327
Calculating Your Working Tolerance: A Guideline
Guideline to calculate your working tolerance - Certified Standard Solutions (CRM)
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
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
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: centrally purified water vs. water from a Milli-Q® IX system were assessed. Tests included media specific for Listeria and Salmonella pathogens.
Products for PFAS Analysis by Method
This page provides tables that list the products used in promulgated methods for Per- and polyfluoroalkyl substances (PFAS) analysis, organized by method and step for easy reference. As new methods are released, this page will be updated.
Fast and High-Resolution LC-MS Separation of PFAS
Liquid Chromatography–Mass Spectrometry (LC-MS) separation of 33 PFAS (Per- and poly-fluoroalkyl substances) using a superficially porous silica particles (SPP) based Ascentis® Express C18 column.
Salmonella Contamination and Testing
Salmonella pass through the entire food chain from animal feed, primary production, and into households or food-service establishments.
Ion Chromatography & Cation Suppression Straightforward Cation Analysis at Trace Levels
Ammonium determination in acidic solutions with Metrosep C Supp 2 column using the acidic binary IC eluent nitric acid/rubidium nitrate concentrate and the sodium bicarbonate/sodium carbonate suppressor regenerant.
Ultrapure Water to Assess Toxic Elements in Environmental Analyses
See the data showing how Milli-Q® ultrapure water meets the stringent purity requirements for reliable trace element analyses of environmental samples.