Soil Nitrate Nitrogen Content Assay kit

Nitrate nitrogen refers to the nitrogen element contained in nitrate. Nitrate nitrogen in the soil is one of the main forms of nitrogen absorption by higher plants, and its content is directly related to the yield and quality of crops.

Under concentrated acid conditions, NO3 reacts with salicylic acid to produce nitrosalicylic acid, which is yellow under alkaline conditions (pH >12), and its color depth is proportional to its content.