The HI93726-01 are high quality reagents that are pre-measured, allowing for users to achieve fast and accurate colorimetric measurements. The method is an adaptation of the photometric method. The reaction between nickel and the reagent causes a blue tint in the sample. By simply adding the reagent to the sample, the reaction will take place and one of Hanna’s compatible benchtop or portable meter will determine the concentration from the color that is produced. The results will be displayed in mg/L (ppm) of nickel. These reagents are designed to be used with samples that have an expected range of 0.00 to 7.00 mg/L nickel.