相对湿度对装修后室内空气中甲醛和氨浓度的影响

目的　观察相对湿度对装修后室内空气中甲醛和氨浓度的影响。方法　甲醛、氨浓度的测定根据GB/T 182 0 4.2 6-2 0 0 0、GB/T 182 0 4.2 5 -2 0 0 0。选12个新装修的房间,随机分为3组,每1组有4个房间,各组的相对湿度分别为5 5 %、65 %、75 % .隔日测定甲醛和氨浓度,连续观察9d。结果　①甲醛5 5 %湿度组、65 %湿度组和75 %湿度组与本组第1天的浓度比较,分别在第3、5天和5d以后差异有显著性(P <0 0 5 ,P <0 0 5 ,P <0 0 1)。②氨5 5 %湿度组、65 %湿度组和75 %湿度组与本组第1天比较,分别在第3、5天和5d以后差异有显著性(P <0 0 5 ,P <0 0 1,P <0 0 1)。结论　室内相对湿度大,有利于降低甲醛和氨浓度

Effect of Relative Humidity on the Concentration of Formaldehyde and Ammonia after Indoor Decoration

[Objective] To observe the effect of relative humidity on the concentration of formaldehyde and ammonia after indoor decoration. [Methods] The concentrations of formaldehyde and ammonia were determined according to GB/T 18204.26-2000, GB/T18204.25-2000. 12 newly decorated rooms were randomly divided into 3 groups with the indoor relative humidity of 55%, 65% and 75% respectively. The concentrations were determined every other day for 9 days. [Results] The formaldehyde groups: significant difference was found among the 3 groups in the 3rd day, 5th day and after 5 days compared with the concentration in the 1st day of the same group (P<0.05, P<0.05,P<0.01). So was found in the 3 ammonia groups (P<0.05, P<0.01, P<0.01). [Conclusion] High indoor relative humidity may help decreasing the concentration of formaldehyde and ammonia.