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首页> 外文期刊>Journal of Hazardous Materials >A rapid and accurate method, ventilated chamber C-history method, of measuring the emission characteristic parameters of formaldehyde/VOCs in building materials
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A rapid and accurate method, ventilated chamber C-history method, of measuring the emission characteristic parameters of formaldehyde/VOCs in building materials

机译：一种快速准确的方法，即通风室C历史法，用于测量建筑材料中甲醛/ VOC的排放特征参数

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摘要

The indoor pollution caused by formaldehyde and volatile organic compounds (VOCs) emitted from building materials poses an adverse effect on people's health. It is necessary to understand and control the behaviors of the emission sources. Based on detailed mass transfer analysis on the emission process in a ventilated chamber, this paper proposes a novel method of measuring the three emission characteristic parameters, i.e., the initial emittable concentration, the diffusion coefficient and the partition coefficient. A linear correlation between the logarithm of dimensionless concentration and time is derived. The three parameters can then be calculated from the intercept and slope of the correlation. Compared with the closed chamber C-history method, the test is performed under ventilated condition thus some commonly-used measurement instruments (e.g., GC/MS, HPLC) can be applied. While compared with other methods, the present method can rapidly and accurately measure the three parameters, with experimental time less than 12 h and R~2 ranging from 0.96 to 0.99 for the cases studied. Independent experiment was carried out to validate the developed method, and good agreement was observed between the simulations based on the determined parameters and experiments. The present method should prove useful for quick characterization of formaldehyde/VOC emissions from indoor materials.
机译：建筑材料释放出的甲醛和挥发性有机化合物（VOC）造成的室内污染对人们的健康造成不利影响。有必要了解和控制排放源的行为。在对通风室内排放过程进行详细的传质分析的基础上，本文提出了测量初始排放浓度，扩散系数和分配系数这三个排放特征参数的新方法。得出了无量纲浓度和时间的对数之间的线性关系。然后可以从相关的截距和斜率计算这三个参数。与密闭室C历史法相比，该测试在通风条件下进行，因此可以使用某些常用的测量仪器（例如GC / MS，HPLC）。与其他方法相比，本方法可以快速，准确地测量这三个参数，实验时间少于12 h，R〜2在0.96至0.99之间。进行了独立的实验以验证所开发的方法，并且根据确定的参数和实验在仿真之间观察到良好的一致性。本方法应证明可用于快速表征室内材料中的甲醛/ VOC排放。

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