Used in environmental monitoring and water quality analysis to detect and quantify common anions such as fluoride, chloride, bromide, nitrate, sulfate, and phosphate in drinking water, wastewater, and natural water sources. These anionic mixtures serve as calibration standards in ion chromatography, ensuring accurate identification and measurement of ionic contaminants. They are essential in assessing pollution levels, monitoring industrial discharges, and maintaining regulatory compliance in public health and environmental protection. Also applied in agricultural testing to evaluate soil and irrigation water for nutrient and salinity levels, supporting optimized fertilizer use and sustainable farming practices.