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  • Ultraviolet-Activated Persulfate Digestion for Tot...
    November 12, 2026
    Total phosphorus (TP) measurement requires converting every phosphorus species—dissolved or particulate, inorganic or organic
    TOC vs. COD: Two Lenses on Organic Pollution
    November 11, 2026
    Total organic carbon and chemical oxygen demand both respond to the same broad question—how much organic matter is in
    A Layered Approach to Unclogging a Chlorophyll Ana...
    November 11, 2026
    ​A blocked sampling tube on an automatic chlorophyll analyzer is rarely the work of a single culprit. Algal filaments, biofilm
    The Hidden Costs of Saline Irrigation Water
    November 11, 2026
    Layered Suppression of Systematic Error in Ammonia...
    November 11, 2026
    ​Systematic error in water-quality ammonia-nitrogen analyzers is distinguished from random noise by its persistence: the deviation
    How the Electrode Method Reads Dissolved Oxygen
    November 10, 2026
    ​The electrode method determines dissolved oxygen by turning a chemical reduction into an electrical current. At its heart is
    The Risk Hiding Behind a Nutrient Label
    November 10, 2026
    ​Phosphate occupies an awkward position in drinking-water safety. It is an essential nutrient, and that fact tends to quiet concern
    Choosing a Legitimate Five-Parameter Water Quality...
    November 10, 2026
    The five parameters—temperature, pH, dissolved oxygen, conductivity and turbidity—sit at the foundation of almost every water
    Beyond “Cool and Dark”: Storing Fluoride Reagents ...
    November 10, 2026
    ​Fluoride analysis relies on reagents with markedly different chemical personalities, so a single storage rule—however convenient
    A Narrow but Necessary Role
    November 9, 2026
    ​The application of a benchtop permanganate index analyzer in the paper industry begins with an admission that is often blurred



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