The instrument adopts o-phenanthroline spectrophotometry. A certain volume of water sample is added with digestion solution. At an appropriate temperature, all the combined iron in the water sample is converted into ionic iron. The pH of the solution is adjusted. Under certain conditions, hydroxylamine hydrochloride is used to reduce high-valent iron to ferrous iron. Under pH conditions of 4-5, ferrous iron and o-phenanthroline generate a stable orange-red complex. The absorbance value of the color system is detected to calculate the iron concentration.
(1) Modular design, good instrument scalability
The instrument can switch monitoring parameters by simply replacing reagents and switching programs, which has good scalability.
(2)Good quality control measures to ensure the reliability of monitoring results
The instrument has many functions, including standard sample verification, zero point verification, span verification, zero point calibration, standard sample calibration, automatic calibration of working curve, and automatic test of spike recovery rate.
The instrument can be controlled remotely.
The instrument has automatic fault alarm function, such as component failure alarm, over-range alarm, abnormal data alarm, reagent shortage alarm (water sample, distilled water, reagent), and can record and upload these faults.
(3)The instrument is safe, intelligent and easy to maintain.
It has the functions of regular automatic cleaning and automatic calibration.
It has the function of automatic range switching according to water sample concentration.
It adopts an embedded operating system Linux, and runs efficiently.
The insulation resistance between the power supply lead and the casing of the instrument is not less than 20 MΩ.
(4)Data transmission meets national standards.
The instrument has remote reverse control function, two-way data transmission function and working status output function.
It has RS-232, RS-485, RJ-45 standard communication interface, and the instrument communication protocol meets the requirements of H/T 212-2017.
It can be applied to surface water, groundwater, seawater, drinking water sources, pollution sources, industrial wastewater, domestic sewage and other water monitoring.
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