1. Guidelines and Protocols: Established guidelines and protocols, such as those provided by the OECD (Organisation for Economic Co-operation and Development) and the EPA (Environmental Protection Agency), set the standards for conducting toxicological studies. 2. Reference Materials: The use of certified reference materials ensures that results are accurate and traceable. 3. Quality Control: Implementing quality control measures, such as regular calibration of equipment and validation of methods, is essential for maintaining high standards. 4. Data Reporting: Standardized formats for data reporting ensure that results are presented consistently and transparently.