【新冠肺炎】一文學識正確稀釋漂白水步驟 1:99非萬能/做錯一步恐產有毒氣體

文: Tracy Chan
2020.01.29

武漢肺炎肆虐,不少人都會購買漂白水進行家居消毒,以保持家居衛生。使用漂白水時除了要小心處理外,應須因應不同情況進行稀釋,例如日常環境清潔及處理嘔吐物時稀釋漂白水的比例就已經不同,並非所有情況都是以1:99漂白水進行清潔消毒。以下就教大家漂白水的正確使用方法,以及幾時用1:99漂白水、幾時用1:49漂白水。

根據衛生署及衛生防護中心指引,因為漂白水對黏膜、皮膚及呼吸道具刺激性,使用前應先打開窗門,使空氣流通,並戴上口罩、膠手套及護眼罩。稀釋漂白水時要使用凍水,因為熱水會令漂白水成分分解,失去效能。

另外,不要與其他家用清潔劑一併或混和使用,以防降低殺菌功能及產生化學作用。例如混合潔廁劑一併使用便會產生有毒氣體,可能造成意外。如有需要,應先用清潔劑清潔及用水過清後,才再用漂白水消毒。如漂白水濺入眼睛,須以清水沖洗至少15分鐘及看醫生。


至於稀釋比例,以漂白水的次氯酸鈉濃度為5.25%來計算,日常環境清潔可用1:99稀釋家用漂白水,即以10毫升漂白水混和於1公升清水內。假如是嘔吐物、排泄物或分泌污染的地方或物件,則以1:49稀釋家用漂白水消毒,將10毫升漂白水加入490毫升清水內。而被血液污染的地方或物件,應以1:4稀釋家用漂白水消毒,將10毫升漂白水加入40毫升清水內。為免降低殺菌能力,經稀釋的漂白水最好在24小時內用完。


另外,應避免將漂白水用於金屬、羊毛、尼龍、絲綢、染色布料及油漆表面。由於次氯酸鈉會隨着時間漸漸分解,因此宜選購生產日期較近的漂白水,及不應過量儲存,避免影響殺菌功能。

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