本文建立了被动式扩散管采集室内空气中甲醛的方法。
A sampling method of passive diffusion tube for collecting formaldehyde in indoor air was established.
目前被动式氚取样器在国外取得了广泛的应用，它是基于气体分子扩散或渗透原理采集空气中氚化水蒸汽（ HTO）样品的一种方法。
Presently, passive HTO samplers are being widely used abroad. It samples HTO in air based on the principle of gas molecular diffusion and permeation.
测量结果表明，空气在煤灰球中的等效扩散系数随煤中灰份的含量的增加呈单调下降的关系，并给出了它们之间的通用关系式。
The experimental results show the measured value of De decreases with increasing ash content, and a relationship between them is derived. Comparisons of calculated burning r…
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