The intensity of the color depends on the concentration of chlorine or bromine present in the water and, by comparison with a graduated scale, it is possible to estimate the concentration of the oxidant.
Phenol red is a substance that reacts to changes in pH by varying its color from yellow to red-purple.
The test with OTO must always be carried out before the pH test as for high levels of chlorine or bromine the pH test may give incorrect results.
Always rinse the cuvettes well with the water to be analyzed before testing.
With the ongoing global crisis, we are experiencing service disruptions from our couriers, so the estimated delivery time shown above may differ from the actual delivery date.
Unfortunately this is out of our control, but we are doing our best to ensure timely delivery.
Thank you for your understanding.
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