Hanna Instruments developed these high-quality reagents for use with their Boron Test Kit. This package contains 100 pre-measured reagents. Each bottle features a clearly marked expiration date and lot number for traceability. Boron is an essential micronutrient for plant growth that may be naturally present in water. It aids in the formation and strengthening of plant cell walls. It also has a positive role in the update of potassium and phosphorous in many plants. To determine the amount of boron available, the Hanna Instruments Boron Test Kit works by adjusting the sample to a known pH value near 7.8. Since boron is a weak acid, the addition of a mannitol reagent forms a complex that acts as a strong acid. The number of drops of an alkaline reagent required to return the sample to the starting pH value corresponds with the boron concentration in the sample.The Hanna Instruments Boron Testing Kit provides readings from 0 to 5 milligrams per liter (mg/L) to 0.2 mg/L resolution. The pre-measured reagents contained in this kit make testing extremely easy and accurate. Use this kit to ensure your plants have the perfect amount of boron for optimal health!