当次氯酸盐溶液在房间里被超声波雾化时,游离氯,即,HOCl和OCl-,以两种形式到达不同位置:细雾液滴和气态次氯酸(HOCl(g))。在这项研究中,在90-m3的房间中测量了到达地板上远离喷雾器的各个位置的游离氯的累积量,使用带有氨基磺酸盐的玻璃纤维过滤器指示器。细液滴以30-90°的不同排出口角度从雾化器吹出到空间中。游离氯被氨基磺酸盐成功捕获,形成一氯氨基磺酸盐,稳定地保留在指示剂上。每个位置的游离氯累积量(ng/指示剂)随起雾时间的增加而增加,并取决于吹气角度和与起雾器的距离。在所有位置观察到地板附近的HOCl(g)浓度的微小差异。雾化处理对湿润表面上的金黄色葡萄球菌的消毒效力在靠近雾化器的位置处相对较高,而在远离雾化器的位置处相对较低。在每个排放口角度,观察到相对活细胞的对数减少与到达金黄色葡萄球菌平板的游离氯累积量之间存在很强的相关性.相关图的回归线的斜率随游离氯的累积量的变化在-0.0362和-0.0413ng-1之间。这项研究表明,使用过滤器指示器测量的游离氯的累积量可以反映细液滴和HOCl(g)的游离氯的总和。消毒效率取决于到达不同区域的游离氯的累积量。
When a hypochlorite solution is ultrasonically fogged in a room, free
chlorine, i.e., HOCl and OCl-, reaches various positions in two forms: fine fog droplets and gaseous hypochlorous acid(HOCl(g)). In this study, the cumulative amount of free
chlorine reaching various positions on the floor away from the fogger was measured in a 90-m3 room, using a sulfamate-carrying glass-fiber filter indicator. The fine droplets were blown out from the fogger into the spaces at different discharge port angles of 30 - 90°. Free chlorine was successfully trapped by sulfamate, forming monochlorosulfamate, which was stably retained on the indicator. The cumulative amount of free
chlorine( ng/indicator) increased with fogging time at each position and depended on the blow angle and distance from the fogger. Minor differences in the HOCl(g) concentration near the floor at all positions were observed. The disinfection efficacy of the fogging treatment against Staphylococcus aureus on wet surfaces was relatively higher at positions near the fogger and lower at positions far from the fogger. At each discharge port angle, a strong correlation between the logarithmic reduction in relative viable cells and the cumulative amount of free chlorine reaching S. aureus plates was observed. The slopes of the regression lines of correlation diagrams as a function of the cumulative amount of free chlorine were between -0.0362 and -0.0413 ng-1. This study demonstrated that the cumulative amount of free
chlorine measured using the filter indicator could reflect the sum of the free chlorine of both fine droplets and HOCl(g), and that the disinfection efficiency depended on the cumulative amount of free
chlorine reaching different areas.