Thermo Scientific Orion 7070iX TRO Analyzer
Thermo Fisher Scientific has developed a total residual oxidant (TRO) analyser to address the needs of the wastewater industry, which requires a robust, dependable instrument capable of measuring low ppb chlorine concentrations in effluent and treated wastewater in line with regulatory requirements.
Operating on US Environmental Protection Agency-approved iodometric electrode technology, the Thermo Scientific Orion 7070iX TRO Analyzer has been designed to offer high sensitivity for low-level chlorine measurements down to 1 ppb with 1 ppb resolution. With this capability, the system provides users with the confidence that chlorine concentrations in water discharged into natural water sources do not exceed the safety threshold or pose a threat to marine life. For optimal application flexibility, the analyser also enables full range measurements up to 15 ppm.
Compared with the conventional DPD (N,N-Diethyl-1,4-Phenylenediamine Sulfate) colorimetric method, the iodometric electrode technology does not suffer from turbidity or colour interferences, which can have a negative impact on result accuracy and precision. Further, the analyser is capable of operating autonomously for long periods of time with minimal instrument drift (<5% for over 180 days without calibration), eliminating the need for routine maintenance.
The system can operate automatically on-demand in intermittent on-off mode, based on sample flow: once the flow starts, the unit’s pumps turn on and they shut down as soon as the flow stops. The analyser also provides real-time monitoring of TRO fluctuations, alerting users within just 120 s from the change, prompting timely corrective action.
Originally published here.
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