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789

当污垢难以用衣物清洁剂洗净时,就需要用到特别的酵素或漂白剂了。虽然同样用来洗去脏污,但与一般清洁剂使用的原理不同。
衣物清洁剂是利用界面活性剂,使脏污与水互相作用,将附着在衣物上的脏污用水清洗冲走,主要作用是将脏污成分从衣物设法移除;酵素或漂白剂则是以化学物与脏污的成分发生反应(通常是将脏污成分氧化分解),破坏去除脏污的成分,主要是用分解方式完成去污的目的。
其中酵素是生物性的清洁剂,两种常用的酵素是淀粉酵素和蛋白质酵素,用来对脏污成分进行分解作用。而常用的漂白剂也分为两类,分别是氯系漂白剂和氧系漂白剂。
氯系漂白剂主要的成分是次氯酸钠,是非常普遍的清洁用品,许多家用环境清洁卫生用品都是以次氯酸钠为主要成分,利用它能使微生物的蛋白质变质,有效杀灭细菌、真菌及病毒,具有消毒及杀菌的作用。氯系漂白水须注意不可与酸性清洁剂(例如清洁厕所用的盐酸)混用,以免产生氯气等有毒气体。
氧系漂白剂主要成分是过氧碳酸钠及过氧化氢,两个都是利用过氧化氢的作用达到漂白与消毒的作用。
这些酵素清洁剂及漂白剂都不是具有高毒性的化学物,而且衣物再经清水冲洗及晾晒、烘干后,残留在衣物上的量都是极低的。因此,如果正常使用,大部分的家庭成员并不会暴露在高剂量下。不过为以防万一,避免危害,使用这些清洁剂或漂白剂要注意:
{1}将清洁剂妥善存放于安全且孩童无法取得的地方。
{2}别因为怕洗不干净或效果不好,就使用过量。
{3}不要与多种清洁剂或是漂白剂混用,以免产生毒害。
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