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酒精作为消毒剂,医护人员几乎天天应用,本文就有关问题作一讨论。一、消毒酒精的浓度应是77.01％(v/v) 目前,医疗单位用于消毒的酒精,其浓度均按75％(容积/容积,v/v)计,实际上,杀菌效果最好的浓度是70％(重量/重量,w/w)[1],该浓度比80％(w/w)的杀菌力大40倍,比60％(w/w)的杀菌力大30倍。当温度为20℃时,70％(w/w)酒精折合容积比浓度是77.01％[2]。酒精的重量比浓度(w/w)换算为容积比(v/v)浓度,可由文献[2]查得。二、酒精的理化特性常温下,酒精是无色透明的液体,易挥发、易燃、膨胀系数比水大6倍,20℃时,酒精的膨胀系
Alcohol as a disinfectant, medical staff almost daily application, this article on the issue for a discussion. First, the concentration of sterilized alcohol should be 77.01% (v / v) At present, the concentration of alcohol used by the medical units for disinfection is 75% (volume / volume, v / v), in fact, the best bactericidal effect The concentration is 70% (w / w, w / w) [1], which is 40 times more germicidal than 80% (w / w) and 30 times more germicidal than 60% (w / w). When the temperature is 20 ℃, the 70% (w / w) alcohol equivalent volume concentration is 77.01% [2]. Alcohol concentration by weight (w / w) converted to the volume ratio (v / v) concentration, can be found in [2]. Second, the physical and chemical properties of alcohol At room temperature, alcohol is a colorless and transparent liquid, volatile, flammable, expansion coefficient 6 times larger than water, 20 ℃, the expansion of alcohol