Heavy metals have always been an important factor in water pollution, which can directly threaten human health through the high enrichment of the food chain, and chromium in water is one of the objects. In this chapter, water quality online monitoring instrument manufacturers will understand together with you how to monitor the content of chromium in water!

The T8000-Cr6 total chromium online analyzer produced by Modi adopts the acid oxidation method to determine the colorimetric determination of the characteristic chromogens after masking interference ions. It has wider applicability and accuracy than the anodic stripping voltammetry, and the implementation standard is GB7471-87. The working principle is that the pre-treated water sample is injected into the colorimetric tank by the injection pump, and then the masking agent is added to eliminate the influence of interfering substances, and then the pH of the solution is adjusted, and the characteristic color developer is added under the appropriate pH condition for color reaction. The color change of the solution within the measurement range is proportional to the concentration of hexvalent chromium in the water sample. You can calculate the amount of hexavalent chromium in the water sample. If the total chromium is measured, the oxidizer is added to the automatic line after pretreatment to oxidize the chromium of various valence states into hexavalent chromium, and then the colorimetric determination is carried out.

Features of the Product

· The water sample pretreatment device adopts maintenance-free design, which can ensure that the maintenance cycle of the pretreatment device exceeds half a year;

· The measurement process and results meet the standards of relevant industries;

· Adjustable quantitative sampling device to ensure that the instrument can accurately measure various water samples by adjusting the reagent dosage and sampling amount;

· Non-contact injection pump is used to avoid direct corrosion of reagent pump, which can greatly extend the life of core components and reduce user costs;

· All imported devices, analytical flow path design and reagent formulation ensure extremely high measurement reproducibility, currently the measurement reproducibility can reach 3%;

· Automatic operation, no personnel on duty, can achieve automatic zero, automatic calibration, automatic measurement, automatic cleaning, automatic maintenance, self-protection, automatic recovery and other intelligent functions;

· Online monitoring methods are diversified, which can realize manual measurement at any time, automatic timing measurement, automatic periodic measurement and other measurement methods.