Used primarily in analytical chemistry for the calibration of instruments and validation of methods, ensuring accurate measurement of arsenic content in various samples. Essential in environmental testing to detect arsenic levels in water, soil, and air, helping to monitor pollution and ensure safety. Applied in the food industry to test for arsenic contamination in products like rice, seafood, and beverages, safeguarding public health. Also utilized in pharmaceutical and industrial settings to verify the absence of arsenic in raw materials and finished products, maintaining quality control and compliance with regulatory standards.