The Hanna Instruments Reagent Phosphorus ULR HI736-25 is a high-quality pre-measured reagent that allows users to achieve quick and accurate measurements with the Phosphorus Ultra Low Range Checker HC.

These reagents follow the ascorbic acid method in which the reaction between phosphorus and the reagents produces a blue tint in the sample. By simply adding the HI736-25 reagent packet to the sample, the reaction will take place, and the HI736 will determine the concentration based on the color produced.

The results will be displayed in ppb of phosphorus. These reagents are designed for use with samples that have an expected range of 0 to 200 ppb of phosphorus.