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Metrohm AG Articles

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  • Free and residual chlorine according to DIN EN ISO 7393-1

    Free and residual chlorine according to DIN EN ISO 7393-1

    Metrohm is pleased to present an Application Bulletin describing the determination of free and total chlorine by iodometric titration. To disinfect water for human consumption, chlorine is added to the water in some countries. Because ...

  • The productive environmental laboratory: BSK Labs boosts efficiency with Metrohm IC

    The productive environmental laboratory: BSK Labs boosts efficiency with Metrohm IC

    BSK Labs runs a number of environmental laboratories and service centers along the west coast of the US. A total of 70 employees – including microbiologists, chemists, lab technicians, and support staff – make sure that the 200 to 350 ...

    Brad Meadows

  • Glyphosate and AMPA in drinking water

    Glyphosate and AMPA in drinking water

    Carcinogenic or not? The broad-spectrum herbicide glyphosate is used all over the world in agriculture. Alongside farming, the chemical is also used for weed-killing in domestic gardens and in public and private spaces kept free from «vegetal ...

    Markus Laeubli;Bastian Brand;Andrea Aeschlimann;Gabriele Zierfels

  • pH measurement: Six technical tips

    pH measurement: Six technical tips

    The pH value is one of the most important and therefore also one of the most frequently measured quantities in analytical chemistry. Sometimes, a simple pH test strip is sufficient for making a rapid check; precise pH meters are, however, required ...

    Christian Haider

  • Like a phoenix from the ashes

    Like a phoenix from the ashes

    Thanks to growing environmental awareness, waste is increasingly being separated and recycled. However, residual waste always remains that can`t easily be recycled. This ends up in waste incineration plants (referred to as KVAs in Swiss German) for ...

  • Determining saccharidic tracers in atmospheric aerosols

    Determining saccharidic tracers in atmospheric aerosols

    Atmosperic aerosols have a strong impact on the climate. Within the organic aerosol fraction, anhydrosugars and sugar alcohols are valuable tracers for biomass burning and biogenic sources. They are best determined by ion chromatography coupled to ...

    S. Rick, A. Wille and A. Steinbach

  • Hyphenated techniques as modern detection systems in ion chromatography

    Hyphenated techniques as modern detection systems in ion chromatography

    Ion chromatography (IC) with conductivity detection has been successfully used to analyze low-molecular organic compounds such as amines and organic acids, as well as anionic and cationic substances. However, due to current toxicity concerns and the ...

  • Opt for the easy way: Determining glycerol in biodiesel using ion chromatography

    Opt for the easy way: Determining glycerol in biodiesel using ion chromatography

    Current US and European standards stipulate gas chromatography to determine the glycerol content in biodiesel. However, this method is both tedious and rather expensive. Metrohm recommends ion chromatography (IC) as a simple, cost-efficient and ...

    J. Gandhi, W. Donaldson and R. Benton

  • Water analysis

    Water analysis

    A complete tap water analysis includes the determination of the pH value, the alkalinity and the total water hardness. Both the pH measurement and the pH titration by means of a standard pH electrode suffer from several drawbacks. First, the ...

    Anja Zimmer