The analysis of pesticide residues in food is crucial for ensuring food safety and protecting public health. This process involves detecting trace amounts of pesticides and their breakdown products, often in concentrations as low as ng/mL. Techniques such as the QuEChERS method are employed, which effectively extract residues from various food matrices like fruits and vegetables. After extraction and clean up steps, compounds are identified using advanced analytical instruments like LC-MS/MS. Adherence to validated methods and rigorous quality assurance protocols is essential to minimize deviations and ensure accuracy. By understanding these processes, analysts can contribute to mitigating health risks associated with pesticide exposure through informed agricultural practices and consumer awareness measures.