PROBLEM TO BE SOLVED: To provide a method for generating a treatment liquid having high resolution performance and/or sterilization ability and excellent in its long lasing property.SOLUTION: A liquid treatment method for generating a treatment liquid includes step S10 for preparing a liquid with pH of 9 or more and step S20 for generating a plasma treatment liquid with pH of 9 or more by generating plasma near the liquid or in the liquid. There is provided a liquid treatment method further containing a step for reducing the plasma treatment liquid to less than pH 6.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】高い分解能力および/又は殺菌能力を有し、その持続性に優れた処理液を生成する方法の提供。【解決手段】処理液を生成する液体処理方法は、pHが9以上の液体を準備するステップS10と、液体の近辺又は液体中でプラズマを発生させることで、pHが9以上のプラズマ処理液を生成するステップS20とを含む液体処理方法。前記プラズマ処理液をpH6未満迄低下させるステップを更に含む液体処理方法。【選択図】図2
