The HI716-25 are high-quality reagents that are pre-measured, allowing for users to achieve fast and accurate measurements with their Bromine Checker^® HC. These reagents follow the DPD Method in which the reaction between bromine and reagent causes a pink tint in the sample. By simply adding the packet of HI716-25 reagent to the sample, the reaction will take place and the HI716 will determine the concentration from the color that is produced. The results will be displayed in ppm (mg/L) of bromine. These reagents are designed to be used with samples that have an expected range of 0.0 to 8.0 ppm bromide.