Variation of Formaldehyde Concentrations in Indoor Air of Newly Decorated Office / 环境与健康杂志

ABSTRACT

Objective To study the variation of formaldehyde concentrations in indoor air of newly decorated office room Methods 7 office rooms decorated 3 months ago were selected to be monitored every 1 5 months for 5 times, and the room temperature was measured at the same time Results During the period from the 3rd month to the 10th month after the decoration,the room temperature dropped from 14 ℃ to 10 ℃,and went up to 26 ℃ again;the average formaldehyde concentration decreased from 0 22 mg/m 3 to 0 09 mg/m 3 and then increased to 0 22 mg/m 3; the over standard rate decreased from 57 1% to 0% and then increased to 85 7% Conclusion During the course of monitoring,formaldehyde concentrations in indoor air did not decrease apparently with the prolongation of the duration after the end of the decoration,but varied according the changes in room temperature,and formaldehyde concentrations in some rooms were higher than the national hygienic standard significantly