The HI93702T-03 are high quality reagents that are pre-measured, allowing for users to achieve fast and accurate colorimetric measurements. These reagents follow the Bicinchoninate Method in which the reaction between total copper and the reagent causes a color change in the sample. By simply adding the packet of HI93702T-03 reagent to the sample, the reaction between copper and reagent causes a purple tint in the sample. The intensity of color is determined by the compatible HI96702 photometer and the concentration will be displayed. The results will be displayed in mg/L (ppm) of total copper. These reagents are designed to be used with samples that have an expected range of 0.00 to 5.00 mg/L total copper.