Give nickel and chromium results a named stream, treatment-state record and comparable follow-up sample.
At a metal-finishing site, rinse-water routes, batch releases and treatment arrangements can change the mixture reaching a monitoring point. Define whether the analyser samples an individual stream, an equalisation outlet or treated effluent. Keep a dated source map so a changed result can be investigated against the actual contributing routes.
The 3S colourimeter offers method-specific nickel and chromium configurations. Confirm whether the required chromium result is Cr(VI) or the configured Cr(III)+Cr(VI) measurement, and how the sample is prepared. Nickel and chromium require their own validated chemistry; two input streams do not by themselves mean two different metals are measured.
Build one reviewable event record around the original result, the water reaching the analyser and the treatment conditions at the time.
Record the connected rinse lines, batch discharges, diversions and tank transfers. A result on a combined outlet identifies that mixture, rather than proving which upstream operation changed.
Keep operating-state changes, dosing adjustments and tank-transfer times with the trend. Record what was observed without assuming that a coincident change establishes the cause.
Record filtration, dilution and any other agreed preparation. Check whether the online and reference methods describe the same metal fraction before comparing their results.
Keep the sample transport delay, selected stream and batch-analysis schedule. Separate valid sample results from cleaning, calibration, reagent changes and interrupted measurement periods.
An investigation is stronger when another shift can reconstruct the sample, measurement basis and actions from the same record.
Record the metal, chemical fraction, concentration units and configured range. Do not compare Cr(VI) directly with a total-chromium result as though they answer the same question.
Note visible colour, solids and known process-chemical changes. Ask PMA to review method suitability where the sample differs from the agreed commissioning matrix; retain the original observations.
Give collected samples their own IDs, points and times. Retain laboratory method and preparation details so any disagreement can be traced to sampling, timing or analytical basis.
Keep the site response, follow-up locations and next review time. Online process information supports the site’s monitoring programme; it does not replace the agreed discharge-sampling or laboratory arrangements.
Provide the source and treatment sketch, target metal fractions, expected normal and event concentrations, sample-conditioning details and reference methods. Include known process additives, sample temperature and available utilities. PMA can then review the chemistry and installation around the stream you actually need to monitor.
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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