The landscape of chemical compounds of safety concern is dynamic, necessitating continuous evaluation of their presence in Post Consumer Recycled Plastic. Understanding the levels of these chemicals and their removal during mechanical and advanced recycling processes is crucial for assessing and communicating the benefits of these technologies. To achieve this, robust quantitative and semi-quantitative methods are needed to efficiently and accurately evaluate the materials and processes involved. These evaluations include physical assessments and comprehensive chemical testing (elemental and organic analysis) The first step in material assessment should focus on polymer quality and performance measures, such as thermal transitions (e.g., differential scanning calorimetry (DSC), blow/injection molding, and color/odor. This ensures that the recycled material meets the required standards for its intended use and can quickly screen materials preventing the need for further testing. The second assessment should involve targeted analyte screening to meet regulatory guidelines (e.g. Pesticides, PAH, and other chemical classes covered by region guidelines). This screening helps to identify specific chemical contaminants and ensure compliance with relevant regulations. Finally, a comprehensive CosPaTox assessment of Non-Intentionally Added Substances (NIAS) enables recyclers and brand owners to partner in evaluating the material and determining its suitability for specific consumer applications. This assessment helps to ensure the safety and appropriate use of recycled materials. By implementing these steps, stakeholders can gain a better understanding of the suitability and chemical composition of recycled plastic, facilitate effective communication regarding its safety, and promote the use of advanced recycling technologies
Jennifer L. L. Morgan PhD | Director-Principal Scientist, Elemental Analysis, Corporate Functions R&D Analytical, P&G
