Study on Concentrations of Formaldehyde in Newly Decorated Apartments

Objective To investigate the concentrations of formaldehyde in newly decorated apartments. Methods In this study we monitored the concentrations of formaldehyde in indoor air of 28 newly decorated apartments and offices and furnishings. In order to analysis the correlation between formaldehyde concentration of indoor air and personal exposure level, 17 persons' exposure levels were measured by personal air monitoring in 2 offices. Results The medians of formaldehyde concentrations in indoor air and furnishings were 0.062 mg/m3 and 0.260 mg/m3 respectively. The concentration of formaldehyde in furniture was significantly higher than that in indoor air (Z=-5.098,P0.000 1). The medians of formaldehyde concentration in indoor air of offices and personal exposure level were 0.046 mg/m3 and 0.078 mg/m3 respectively, which showed no statistically significant difference (Z=-1.905,P=0.057). Conclusion Furnishings were the significant resource of formaldehyde and had an impact on indoor air quality in newly decorated apartments. The monitoring results of formaldehyde concentration in indoor air could reflect the personal exposure level. In order to maintain indoor air quality, ventilation rate should be increased by opening windows frequently.