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[目的 ]了解新装饰开业公共场所甲醛污染状况。 [方法 ]用甲醛分析仪对新装饰开业 2年内 4 7家公共场所室内空气甲醛浓度进行测定。 [结果 ]开业前 3个月各场所甲醛浓度全部超标 ,总超标率为 79.6% ,开业后第4～ 12个月总超标率为 2 4 .3 % ,第 13～ 2 4个月总超标率为 13 .0 %。趋势显著性检验表明 :甲醛超标率随着开业时间延长越来越低 ( P<0 .0 5 )。第 1～ 3个月和第 4～ 12个月比较 ,甲醛超标率差异显著 ( P<0 .0 1) ;第 4～ 12个月和第 13～ 2 4个月甲醛超标率比较 ,差异无显著性 ( P>0 .0 5 )。使用中央空调和使用普通空调的宾馆甲醛超标率有差异 ( P<0 .0 5 )。 [结论 ]新装饰开业公共场所甲醛污染较重 ,甲醛浓度的下降主要在新装饰开业 3个月后。使用中央空调的宾馆甲醛浓度高于使用普通空调的宾馆。
[Objective] To understand the status of formaldehyde pollution in newly decorated public places. [Method] Formaldehyde analyzer was used to determine the concentration of formaldehyde in indoor air of 47 public places within 2 years after the new decoration was opened. [Results] Formaldehyde concentrations in all sites exceeded the standard in the three months prior to the opening, with a total exceeding standard rate of 79.6%. After the first 4 months of operation, the total exceeding standard rate was 24.3%. The total over-standard rates of the 13th to 24th months 13.0%. The trend saliency test showed that the formaldehyde super-standard rate was getting lower and lower with the opening time (P <0.05). The first to third months and the fourth to the twelfth month, the formaldehyde excess rate was significantly different (P <0. 01); 4th to 12th and 13th to 24th month formaldehyde excessive rate comparison, the difference was not Significance (P> 0.05). There was a difference (P <0.05) in the excess formaldehyde rate of hotels using central air conditioners and hotels using ordinary air conditioners. [Conclusion] Formaldehyde pollution was heavy in the newly decorated public places, and the decrease of formaldehyde concentration mainly occurred 3 months after the new decoration was opened. The use of central air conditioning formaldehyde in hotels than the use of ordinary air-conditioned hotels.