Iron Test Strips 0100 ppm Vial of 50 Strips for Measuring Free Soluble Iron Fe2 and Fe3

The Iron test strip measures free soluble Iron Fe2+ (ferrous) and Fe3+ (ferric) in water from 0-100 ppm in just seconds. This test strip has color chart blocks at 0, 2, 5, 10, 25, 50, and 100ppm. The Iron test strips only work on iron ions that are free in solution. They will not detect Iron that is complexed with a chelating agent, such as EDTA. Iron chelates are often used in products such as fertilizer to aid in improving the availability of the iron as a plant nutrient. Instructions: Remove one Iron test strip from the vial. Immerse the test strip into the solution being tested for 2-3 seconds. Remove and compare to the color chart after 30 seconds.