What should be paid attention to when using the residual chlorine detector

1. Chloride ions are not within the measurement range of residual chlorine. Free chlorine measurement includes the measurement of free chlorine and combined chlorine content. 2. The determination of free chlorine must be carried out at pH 6.2---6.5, adding DPD reagent to directly react to form a red compound. If the pH is out of range, adjust with buffer reagents or dilute acids or bases. 3. The principle of the total chlorine determination method: when the pH is 6.2----6.5, add excess potassium iodide and DPD to directly react to generate a red compound. If the pH is out of range, adjust with buffer reagents or dilute acids or bases. 4. Turbid samples must be filtered before measurement. 5. Cannot measure colored samples. 6. The cuvette should be cleaned and stored dry after each use.
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