The MI527-25 IodinePowder reagent kit includes high-quality reagents that are ready-to-use with MW13. The MW34 meter and reagents use the DPD Method. The reaction between Iodineand the reagent causes a pink tint in the sample. Simply add the reagent to the sample, wait for the reaction to take place and the photometer determines the concentration based on the color. The reagents are designed for use with samples that have an expected range of 0.0 to 12.5 ppm (mg/L). Iodinepowder reagent replacement kit (25 tests) Pre-made reagents for precision and ease of use Marked with expiration date and lot number for traceability For use with the MW13 Tester