METHOD FOR MAINTAINING MICROBICIDAL ACTIVITY OF HISTIDINE-SILVER COMPLEX IN CHLORINE ION-CONTAINING SOLUTION AND LIQUID ANTIMICROBIAL AGENT COMPOSITION
PROBLEM TO BE SOLVED: To provide a method and a composition for maintaining the microbicidal activity of a histidine-silver complex even in a chlorine ion-containing liquid.SOLUTION: The microbicidal activity of the histidine-silver complex in a chlorine ion-containing liquid is maintained by adding a water-soluble nitrogen-containing polymer, such as one typically represented by a polyethyleneimine, to obtain an effect preventing the reaction of the histidine silver complex with the chlorine ion. In addition, a liquid antimicrobial agent composition is obtained by mixing (a) silver oxide, (b) L-histidine, (c) a water-soluble nitrogen-containing polymer and (d) a solvent.【課題】塩素イオンを含有する液中でもヒスチジン銀錯体の殺菌活性を維持する方法および組成物の提供。【解決手段】ポリエチレンイミンに代表されるような水溶性含窒素ポリマーを添加することにより、ヒスチジン銀錯体と塩素イオンとの反応を防止する効果が得られ、塩素イオン含有液中でのヒスチジン銀錯体の殺菌活性が維持される。また、（ａ）酸化銀、（ｂ）Ｌ－ヒスチジン、（ｃ）水溶性含窒素ポリマー、（ｄ）溶媒を混合することにより液状抗菌剤組成物が得られる。【選択図】なし
