PROBLEM TO BE SOLVED: To provide a method for preparing a mixed solvent.SOLUTION: A preparation method of a mixed solvent according to the present invention includes the steps of: preparing two or more solvents to test the compatibility of each solvent with water and determining a plurality of solvents used in a mixed solvent based on the result of the compatibility test and the solubility of a compound to be dissolved in each solvent.SELECTED DRAWING: NoneCOPYRIGHT: (C)2016,JPO&INPIT【課題】混合溶剤の調製方法を提供する。【解決手段】本発明の混合溶剤の調製方法は、2以上の溶剤を準備し、各溶剤の水との相溶性を試験する工程と、相溶性の試験の結果および上記各溶剤における被溶解化合物の溶解度に基づき、混合溶剤に使用する複数の溶剤を決定する工程と、を包含する。【選択図】なし
