【摘要】 目的研究过氧乙酸空气消毒后的残留量消减规律及其影响因素。方法用气溶胶喷雾法及改良的过氧乙酸含量化学测定法评价研究场所过氧乙酸的残留量。结果在模拟常态和塑料薄膜覆盖墙内壁的试验条件下,过氧乙酸消减规律符合一种指数消减模型,即y=ae-bx,(R2>0.95),用不同浓度过氧乙酸(1000、2000、5000、10 000 mg/L)喷洒病房,立即采样20 min,各浓度残留量平均值依次为5.8、8.1、20.4、39.9 mg/m3,各组间差异有统计学意义(P<0.05),且与浓度呈正相关(R2=0.9732,P<0.05);用1000 mg/L过氧乙酸喷洒不同场所(病房、幼儿园教室和公交车),立即采样20 min,空气中过氧乙酸平均残留量依次为5.8、5.3、3.7 mg/m3,各研究点间差异有统计学意义(P<0.05)。结论过氧乙酸空气消毒时,其残留量随时间延长而呈指数变化趋势;当施药浓度增加时,其在空气中残留量亦升高;室内墙壁材料影响过氧乙酸在空气中的残留量。更多还原

【Abstract】 OBJECTIVE To investigate the decreasing rules and the impactfactors of peracetic acid.METHODS The residues level of peracetic acid was evaluated by aerosol sprayer and improved chemical analysis methods.RESULTS The exponential model of the level of peracetic acid in air,ie,y=ae-bx(R2>0.95) was established under the simulated normal condition and the experimental condition of the walls covered with the plastic film.After the wards disinfected with the different concentrations of peracetic acid(1000,2000,5000,and 10 000 mg/L),the samples were taken for 20 min.The average residues levels of peracetic acid in the wards were 5.8,8.1,20.4,and 39.9 mg/m3,respectively and showed significant difference among the samples(P<0.05).The positive correlation between the residue level of peracetic acid and the used concentration of the disinfectants was observed as well(R2=0.9732,P<0.05).Moreover,after the different studied places(wards,classrooms in kindergarten and buses) were disinfected with peracetic acid at 1000mg/L in spray,followed the monitoring for 20min,average residues levels of peracetic acid in air were 5.8,8.14,20.4 and 39.9 mg/m3.The statistical differences among the samples were also found(P<0.05).CONCLUSIONS The findings suggest that the residues level of peracetic acid show an exponential changing trend oven disinfecting time.The residues concentration of peracetic acid in air will increase while high concentration of disinfentant is used.The residues level of peracetic acid is also associated with the materials of walls of studied places.更多还原