Meaning
Performance metric representing the percentage of a target substance that is successfully recovered from a polymer matrix during a laboratory preparation step. The ability of a solvent to penetrate the plastic and dissolve additives depends on the chemical similarity between the liquid and the solute, as well as the temperature and duration of the process. A high value ensures that the subsequent analysis reflects the true concentration of antioxidants or stabilizers present in the resin.
Solvent Selection
Choosing a fluid that swells the polymer without completely dissolving it often yields the best results for solid samples. The extraction solvent efficiency of a toluene-based method might be superior for polyolefins, while an alcohol is better suited for polar resins like polyester.
Method Validation
Precision in safety reporting relies on knowing exactly how much of a migrant is left behind in the plastic. Spiked samples are used to measure the extraction solvent efficiency, ensuring that the final data is corrected for any incomplete recovery during the preparation phase.
Cost Optimization
Reducing the time required for sample preparation increases the throughput of the quality control lab. Optimization of the temperature and pressure can enhance the extraction solvent efficiency, allowing for shorter cycles and lower solvent consumption during the testing of large resin batches.
