38 Articles found
Metrohm AG Articles
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Fast screening for adsorbable organically bound halogens
Metrohm Combustion IC – a validated all-in-one solution for comprehensive AOX determination (AOF, AOCl, AOBr, AOI) according to DIN 38409-59 Organohalogen compounds are widespread, persistent, and potentially toxic for humans and the ...
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Monitoring PFAS in water sources
Non-targeted adsorbable organically bound fluorine (AOF) analysis by CIC Per- and polyfluorinated alkyl substances (PFASs) are thousands of organic molecules in which all the hydrogen atoms on at least one carbon are replaced by fluorine ...
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Fast analysis of AOX in waters by CIC
Measurement of AOCl, AOBr, AOI, and AOF according to DIN 38409-59 AOX (adsorbable organically bound halogens) is a complex parameter covering the sum of halogenated organic compounds adsorbable on activated carbon. Many of these organohalogens ...
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Determining dissolved oxygen in water: Titration or direct measurement?
Dissolved oxygen is a term describing the amount of oxygen molecules (O2) which are dissolved in a liquid phase under certain conditions. In this white paper, two different methods for the analysis of dissolved oxygen, titration and direct ...
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Simple determination of haloacetic acids (HAAs) in potable water with ion chromatography hyphenated to mass spectrometry
Haloacetic acids (HAAs) are commonly produced as disinfection byproducts (DBPs) from water treatment processes. Some HAAs are regulated by the author- ities and have been classified as potentially carcino- genic. They have traditionally been ...
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Adsorbable organic fluorine (AOF) – a sum parameter for non-targeted screening of per- and polyfluorinated alkyl substances (PFASs) in waters
The prevalence of per- and polyfluorinated alkyl substances (PFASs) and other perfluorinated compounds (PFCs) that persist and accumulate in the environment (as well as in our own bodies) is becoming an increasing concern to international health ...
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Fast assessment of adsorbable organically bound halogens (AOX) in waters
Determination of AOCl, AOBr, AOI, and AOF with combustion ion chromatography (CIC) according to DIN 38409-59 Adsorbable organically bound halogens (known as AOX) are the sum of numerous halogenated organic compounds that are adsorbable on ...
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Green alternative methods for voltammetric analysis in different water matrices
Mercury-free methods for determination of heavy metals in boiler feed, drinking, and sea water samples. Stripping voltammetry uses electrochemical sensors for the determination of heavy metal ions in different types of samples. These ...
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How to utilize grounding modes in electrochemical experiments
In a typical electrochemical experimental setup, the working electrode is not directly connected to the ground. This allows the use of a grounded potentiostat/galvanostat (PGSTAT) for the electrochemical research. However, there are times when ...
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QC and product screening of medicinal cannabis with NIR spectroscopy
Cannabis and near-infrared spectroscopy Near-infrared spectroscopy (NIRS) is a fast analytical technique with low running costs used to perform quality control (QC) and product screening on various cannabis products, including hemp. It ...
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Coping with the daily challenges of routine water analysis
Analyzing different types of water samples on a regular basis presents several challenges for analysts. Depending on the type of lab (e.g., municipal or water bottling facilities), the number of samples to be analyzed can vary significantly. Every ...
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Analyzing halogenated organic compounds with CIC according to DIN 38409-59
What is it that makes your clothing repel water or your cookware have nonstick properties? The answer could be the use of per- and polyfluorinated alkyl substances (PFASs) to coat these materials. This blog article explains how PFASs and other ...
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Raman spectroelectrochemistry from India to Spain: History and applications
One of the most interesting spectroelectrochemical techniques combines the fields of electrochemistry and Raman spectroscopy. Although the Raman effect was theoretically predicted by Smekal in 1923 [1] as well as by Kramers and Heisenberg in 1925 ...
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Frequently Asked Questions (FAQ) about Raman spectroscopy: Theory and usage
Raman spectroscopy is a non-destructive analytical technique based on the inelastic scattering of photons related to the different vibrational modes of molecules. This discovery by C. V. Raman in 1928 resulted in a simple yet effective method to ...
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Electrochemistry in laminar and turbulent flow conditions using rotating electrodes
Electrochemical experiments are generally performed in cells with quiescent electrolytes. This means that the motion of molecules and ions is imparted by the natural convection process. However, forced convection is sometimes necessary in ...
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Near-infrared spectroscopy (NIRS): The perfect solution to monitor purity of recovered solvents
Solvent recovery is the process of extracting useful solvents and raw materials from waste or byproduct solvents that are generated during manufacturing processes. The solvents that are used in these situations are often not disposed of or ...
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Transform your routine electrochemical research - Go Multi!
For humans, multitasking is a myth. There is a high probability of failure with this practice, and associated negative effects include decreased attention, lower productivity, worsened memory, an increased risk of errors, increased stress, and more ...
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NIR spectroscopy in the personal care and cosmetics industry: The ideal tool for QC and product screening - Part 1
Personal care and cosmetic products are ubiquitous in our daily lives. Most of us wouldn’t readily go out to meet our peers without first practicing a bit of hygiene, which is why these products are so widely used. Personal ...
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Automation beyond the lab - Integrating the most precise lab pH measurements into production processes
As you read this blog, thousands of pH measurements are being performed around the world. They often adhere to the same pattern: manual sampling followed by laboratory analysis — meaning inherent disadvantages including increased time ...
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Handheld 785 nm Raman applications: Cutting edge material ID capabilities in your pocket
Handheld 785 nm Raman is a well-established material identification technique, most notably in the pharmaceutical and defense and security markets. Now, new capabilities developed by Metrohm Raman are expected to increase the capabilities of ...
