Nitrates are chemical anions, representing a common and critical form of nitrogen found throughout the planet's biogeochemical cycles. Chemically, the nitrate ion ($\text{NO}_3^-$) plays a central role in the nitrogen cycle, being the final product of nitrification, a process where organic nitrogen compounds are converted into inorganic forms. In biological contexts, these compounds serve as vital nutrients, particularly for plant growth, and are widely utilized in the agricultural sector as fertilizer because they are readily absorbable by root systems. Beyond agriculture, nitrates are fundamental chemical components studied in physical and environmental sciences, where their concentrations are monitored to understand water chemistry, geological processes, and the overall balance of nitrogen within various ecosystems.