Total Residual Oxidant Analyser Designed for Low ppb Chlorine Concentration Measurements in Wastewater

摘要

Thermo Fisher Scientific has developed a new Total Residual Oxidant (TRO) analyser to address the needs of the wastewater industry, which calls for a robust, dependable instrument capable of reliably measuring low ppb chlorine concentrations in effluent and treated wastewater in line with stringent regulatory requirements. Compared to 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 Orion 7070iX Analyzer is capable of operating autonomously for long periods of time with minimal instrument drift (<5% for >180 days without calibration)eliminating the need for routine maintenance. At the same time, the system's self-cleaning capability prevents chemical and biological fouling of the measurement cell and sensor, minimising downtime and facilitating continuous testing.