| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for extracting chemicals contained in a sample which comprises a polymer composition in a short time.SOLUTION: This extraction method of chemicals includes: (1) a step for preparing a sample containing a polymer and chemicals; (2) a step for swelling or dissolving a polymer by feeding a first solvent; (3) a step for contracting or precipitating a polymer by feeding a second solvent; and (4) a step for evaporating the second solvent. Preferably, in this extraction method, the processing frequency by a flow including the step for feeding the first solvent, the step for feeding the second solvent, and this step for evaporating the second solvent is once or more and four times or less. Preferably, in this extraction method, a solubility parameter of the first solvent is 7.0 or greater and 9.5 or less. Preferably, in this extraction method, a solubility parameter of the second solvent is 10.0 or greater and 16.0 or less. |
