Which spectrophotometer should you choose for water analysis? A spectrophotometer measures the amount of light absorbed by a sample at a given wavelength. Common colorimetric methods operate in the visible range. Other analyses use shorter wavelengths in the ultraviolet (UV) range. The instrument’s spectral range must therefore cover the methods to be performed at the…
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How to monitor turbidity during dredging operations? Turbidity monitoring during dredging operations is organised before work begins: the initial conditions must be established, measurement points defined and the planned protocol then applied throughout the operations. Monitoring makes it possible to identify an increase caused by sediment resuspension and track its development around the area. Monitoring…
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Industrial wastewater in Italy: when should online monitoring be used? For the monitoring of industrial wastewater in Italy, online monitoring becomes relevant when laboratory analyses do not provide sufficient visibility into variations in the discharge. Online monitoring then makes it possible to observe changes between two sampling operations and relate them to site operation. The…
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Why monitor chlorides in industrial water? In an industrial installation, chloride concentration varies depending on the water used, process inputs and, in some circuits, evaporation. An increase may therefore prompt checks of the make-up water, the introduction of a higher-chloride stream or possible saline contamination. Chlorides are monitored in process water, cooling circuits, make-up water…
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Seawater conductivity: what role does it play in multiparameter monitoring? In a coastal or port area, or near an estuary, seawater conductivity helps quickly identify a change in the monitored water mass. This measurement is useful for detecting that a change is occurring, but it does not explain the cause on its own. This is…
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Interpreting dissolved oxygen in Scottish salmon farms Dissolved oxygen measurements in Scottish salmon farms must be interpreted by taking into account environmental conditions and farm operation. A decrease may have different implications depending on its duration, the depth affected, its extent across the cages and the events observed at the same time. Summer periods require…
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UV254 water monitoring: tracking organic matter UV254 is one of the parameters used in water quality analysis. The measurement tracks the absorption of ultraviolet light at 254 nanometres (nm) by dissolved organic compounds that absorb at this wavelength. It provides a continuous reading of their variations, without the addition of reagents or consumables. This measurement…
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How to test iron in water circuits? Testing iron in water circuit consists of measuring the ferrous and ferric ions present in the sample in order to detect degradation of metallic materials or an external input. The result is expressed in milligrams per litre (mg/L) and must be interpreted according to the installation being monitored.…
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Connected buoys: which sensors should be used to monitor water quality? Connected buoys are floating measurement platforms equipped with sensors to monitor water quality directly in the environment. They collect and transmit data such as turbidity, conductivity, salinity and dissolved oxygen, particularly in port areas, lakes and reservoirs, aquaculture facilities and sensitive natural environments. The…
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Ammonium analysis in water: which method should you choose? Ammonium (NH₄⁺) is a form of nitrogen found in many aquatic environments. Its analysis consists of measuring its concentration in water in order to monitor changes in an environment, control certain treatments or detect changes in water quality depending on the context. In wastewater, drinking water,…
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