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facet applications:Drinking water testing​
facet applications:Photometry and reflectometry
facet applications:Soil, solid waste, and groundwater testing
facet applications:Waste water and process water​ testing
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facet content type:Technical Article
Identification of Cell Culture Media with Raman Spectroscopy
Identification of cell culture media samples by traditional LC methods, such as amino acid or vitamin analysis, has high costs, and requires significant analytical expertise and laboratory space.
Calculating Your Working Tolerance: A Guideline
Guideline to calculate your working tolerance - Certified Standard Solutions (CRM)
An Easier, Faster, and Cost-Effective Option for Measuring Total Nitrogen
This total nitrogen test kit is faster, safer, more accurate and costs less than the traditional method. The Total Nitrogen Analysis test kit was developed to provide users with a single test method for determining total nitrogen levels in process
Mesoporous Silica and their Applications
Mesoporous Silica and their Applications
Neonicotinoids Pesticides and Metabolites
Neonicotinoids have established themselves as key components in insecticides because of their unique selectivity. The mode of action is similar to nicotine.
Sensitive Determination of Iron in Drinking Water, Mineral Water, Groundwater, and Spring Water Using Rapid Photometric Tests
Spectroquant® Iron Test - a suitable alternative to ICP or AAS for determination of iron in drinking water, mineral water, groundwater, and spring water.
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.
Electrochemistry on the Bench and in the Field
Nanomaterials, electrochemistry, BASi, LIB, Lithium Ion Batteries, reference electrode, Teflon, silver nitrate, working electrodes, counter electrode, organic electrosynthesis
Selectophore Ionophores
Sigma-Aldrich.com presents an article on Selectophore Ionophores
How to Select the Right Water Purification System for Your Lab
Technical article on Selecting the Right Water Purification System
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
Navigating Disinfection Control in Food and Beverage Manufacturing
Learn about disinfection control and how to select the right disinfectant among the various options available in its methods and instrumentation based on photometry and reflectometry.
pH in Fruit Juices
An easy-to-use, economical, and smartphone-based reliable determination of pH in fruit juices using the MQuant® pH test strips and the MQuant® StripScan app.
Ultrapure Water for Perchlorate Analysis of Environmental Samples
Assure perchlorate-free water from tap water for sensitive IC analyses. See the removal efficiencies achieved by water purification technologies in Milli-Q® systems.
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.
Ammonium in Wastewater
Step-by-step accurate reflectometric determination of ammonium in wastewater with Nessler’s reagent or Indophenol blue using Reflectroquant® system and test strips.
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.
pH in Soft Drinks
An easy-to-use and economical approach for reliable determination of pH of soft drinks with MQuant® pH test strips and MQuant® StripScan App.
Phosphate in Groundwater and Surface Water: A Rapid and Reliable Determination Method using the Photometric Spectroquant® Test
The analysis of low concentrations of PO4-P in natural, uncontaminated waters is often challenging. The Spectroquant® photometric test provides an easy-to-use and sensitive method for quantification with results comparable to DIN EN ISO 6878.
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
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.
What is Titration?
Titration is a quantitative chemical analysis method to determine the unknown concentration of any substance, such as a raw material, substance or finished good.
Determination of Phospholipid Oxidation by UV/VIS Spectroscopy - Avanti® Polar Lipids
The percent oxidation of a phospholipid can be determined by using Beer’s Law to calculate the peroxidized phospholipid’s concentration from its absorbance at 234 nm.
Transmittance to Absorbance Table
Transmittance to absorbance table for fast conversion. Use this chart as a handy reference in the lab, classroom or field. The online transmittance chart is available to download and share.
Enzymatic Method for Determining Branched Chain Amino Acids (BCAA Assay)
Assay protocol for the colorimetric detection of Branched Chain Amino Acids (BCAA) in biological samples using the alanine assay kit.
Analytical Method: Analytical Quality Assurance, Standard for COD/Chloride
Preparation of a standard solution for COD/chloride
Nitrate in Vegetables
Step-by-step method describing the reflectometric determination of nitrate levels in various vegetables after reduction to nitrite and detection with Griess reagent using Reflectoquant® system and test strips.
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
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.
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