Metribuzin standard solution is primarily used in analytical laboratories for the calibration and validation of instruments involved in pesticide residue analysis. It serves as a reference standard to quantify metribuzin levels in environmental samples such as soil, water, and crops. This solution is essential in ensuring accurate measurement in quality control processes within agricultural and environmental monitoring programs. It supports compliance with regulatory standards by enabling precise detection of metribuzin concentration, even at low levels, in food safety testing and environmental risk assessments.