A composition comprising an active ingredient, an oil and an ionic liquid. The present invention includes: A) an organic active ingredient in a dissolved form that is sparingly water-soluble and sparingly oil-soluble; B) an oil that can be dissolved in water at 20 ° C. up to 20 g / l; and C) a positive electrode described below. The present invention relates to a liquid composition comprising an ionic liquid containing ions and anions. Also provided is a method of preparing a liquid composition in which the active ingredient, oil and ionic liquid are contacted, and further the use of the ionic liquid to increase the solubility of the active ingredient in the oil. [Selection figure] None有効成分、油及びイオン性液体を含む組成物。本発明は、A)難水溶性及び難油溶性である溶解形態の有機有効成分と、B)20℃の水に最大で20g/lまで溶解可能な油と、C)以下に記載される陽イオン及び陰イオンを含むイオン性液体とを含む液体組成物に関する。有効成分、油及びイオン性液体を接触させる液体組成物の調製方法、そして更に油に対する有効成分の溶解度を上昇させるためのイオン性液体の使用も提供する。【選択図】なし