The human daily intake of boron from food and beverages is approximately 2 mg. This is far below any toxic level. Some plants, however, are extremely sensitive to boron concentrations above 1 mg/L, e.g., strawberries, blackberries. As seawater contains 4 to 5.5 mg/L of boron, desalination is required to remove surplus boron besides other ions. This application shows the determination of boron (as borate) by ion-exclusion chromatography with conductivity detection after inverse suppression. The method has been optimized to get a sufficient fluoride/borate separation.