The HI7024-25 are high-quality reagents that are pre-measured, allowing users to achieve fast and accurate measurements with their High Range Copper Checker® HC. These reagents follow the Bicinchoninate Method in which the reaction between copper and the reagent causes a purple tint in the sample. By simply adding the packet of HI7024-25 reagent to the sample, the reaction will take place and the HI7024 will determine the concentration from the color that is produced. The results will be displayed in ppm (mg/L) of copper. These reagents are made to be used with samples that have an expected range of 0.00 to 5.00 ppm Copper.