新装修居室内空气中甲醛污染状况调查分析

目的：了解新装修后居室内空气中甲醛污染状况及来源。方法：对11套普通新装修住宅采用酚试剂分光光度法测定居室内空气中甲醛浓度。结果：11套新装修住宅共测定样品36件，样品合格率为36．1％，其中装修后家具装饰齐全的住宅北屋的样品合格率最低。结论：新装修居室甲醛污染状况严重，室内甲醛污染不仅主要是由装修后家具装饰所引起，而且还与居室内环境条件有关，夏季气温高，相对湿度大，甲醛释放量达到最高，空气中甲醛浓度会随着时间的延长而缓慢下降，装修后不应急于人住，要坚持室内通风换气，当室内空气中甲醛浓度检测合格后再人住，减少由于室内甲醛浓度超标给住户带来的健康危害。

Investigation of indoor air pollution by formaldehyde in newly decorated rooms

Objective:To know the situation and source of formaldehyde pollution in the indoor air in newly decorated rooms.Methods:3-Methyl-2-benzothiazoline hydrazone hydrochloride(MBTH) spectrophotometric method was used to determine the concentration of formaldehyde in the indoor air in 11 newly decorated flats.Results:Thirty-six samples in 11 newly decorated flats were determined.The qualification rate of formaldehyde concentration was 36.1%,which in north room with furniture was the lowest.Conclusion:The indoor air pollution by formaldehyde in newly decorated rooms is severe.The decorating materials,furniture and the indoor environmental conditions are the main source of indoor air pollution by formaldehyde.In summer,the temperature is high,the relative humidity is high,the amount of releasing formaldehyde reaches highest.The formaldehyde concentration in the indoor air decreases slowly with increasing in time.The room is not suited for living after decoration until the formaldehyde concentration in the indoor air is below the national standard value.The harm to health caused by formaldehyde can be reduced.