The Nitrite test strip is used to detect Nitrite in solution at increments of 1, 5, 10, & 25ppm. These strips are often used when testing for Nitrites in wine, seafood, and sandwich meats, such as ham and bologna. This strip is very sensitive to light and moisture, so be sure to keep the vial tightly sealed. For a dual Nitrate-Nitrite test, check out or combo test strip with both tests in one.