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 regulatory compliance testing, helping to monitor pollution levels, assess agricultural runoff, and maintain safe water supplies. Also used in industrial process control, such as in semiconductor manufacturing and power generation, where precise anion levels must be maintained to prevent equipment corrosion and ensure product purity.