Metribuzin standard solution is primarily used in analytical laboratories for the calibration and validation of instruments that detect and quantify metribuzin residues in environmental and agricultural samples. It serves as a reference standard in high-performance liquid chromatography (HPLC) and gas chromatography-mass spectrometry (GC-MS) to ensure accurate measurement of metribuzin levels in soil, water, and crops. This standard solution is essential for monitoring pesticide compliance with regulatory limits, supporting environmental safety assessments, and conducting research on herbicide persistence and degradation. Its precise concentration allows for reliable quantification, making it critical in quality control processes within agrochemical testing and environmental monitoring programs.