Connect aluminium or iron results to coagulation, filtration and a comparable sample record.
Residual aluminium or iron at a drinking-water works should be reviewed against the treatment arrangement that produced the sample. Identify the coagulant used, the clarification and filtration stages in service, and the location of the take-off. A combined outlet result describes the water reaching it and does not identify an individual treatment unit.
The 3S colourimeter has aluminium and iron configurations for drinking-water duties. Choose the method for the target metal, required range and sample matrix. Confirm how sample preparation defines the measured fraction; do not assume that a filtered online result is interchangeable with a differently prepared reference sample.
Preserve the operating information needed to explain the measurement and compare events fairly.
Record the coagulant and target metal. Aluminium and iron require their own selected analytical methods. Confirm a proposed multi-parameter arrangement rather than inferring compatibility from the platform name.
Name the clarification, individual-filter or common-outlet point. Retain the route and the units contributing to it, including any bypass or return stream.
Keep dose delivery, plant flow, available pH and turbidity observations, source changes and operating events with the metal trend. Each measurement needs its own point and timestamp.
Document screening, filtration, conditioning and travel time. Keep calibration, reagent and cleaning events visible so process changes and analyser events can be distinguished.
Use the measurement to organise a treatment review under the works’ existing procedures.
Check changes in source, treatment units, backwash return or supply routing before attributing a common-outlet change to a particular unit.
Record reference sample time, point, handling and method. Match the measured fraction and reporting basis before judging agreement.
Consider the residual with dose, pH, turbidity and the relevant treatment observations. A metal residual on its own does not define the optimum coagulant dose.
Keep the original trend, follow-up results, operator actions and next review time together. Record whether sampling or analyser settings changed during the event.
Send the treatment drawing, coagulant identity, intended aluminium or iron duty, expected range and reference method. Include sample preparation, source-water conditions, sample-line route and the decision the result supports. PMA can review the analytical method, sample arrangement and servicing needs with your operating team.
PMA connects the measurement, installation and operating team. We help you review the application, select suitable instrumentation and plan commissioning, training and ongoing service.
Speak to the PMA team about your instruments, reagents or service requirements. Tell us what you need, and we’ll help you find the right next step.
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