DPD Liquid Reagent DPD-WA-18 1pc

The expiration date of DPD liquid reagent is approximately 2 months when stored at low temperature. Please use the reagent as soon as possible after opening. When the liquid reagent turns pink-purple, it is considered that the reagent has reached the end of its life. When using DPD liquid reagent to measure residual chlorine, appropriate measurement values ​​are obtained when the respective ratios of free chlorine and combined chlorine are 100%. When free chlorine and combined chlorine coexist, there is no color selectivity, so the measurement is an approximation of the total residual chlorine value. How to measure total residual chlorine: One type of liquid, DPD liquid, can measure total residual chlorine. To measure, take 10mL of test water, add 0.5mL of DPD-WA, mix, leave for about 2 minutes, compare the color and calculate the total residual chlorine. 1 piece (18mL)