Partitioning to surfaces is an important sink for volatile organic compounds (VOCs) indoors, but the mechanisms are not well understood or quantified. Here, a mass spectrometer was coupled to a portable surface reactor and a flow tube to measure partitioning of VOCs into paint films coated onto glass or wallboard, and their subsequent diffusion. A model was developed to extract values of the effective absorbing organic mass concentration of the film, C_w, which is a measure of absorption capacity, and VOC diffusion coefficients, D_f, from VOC time profiles measured during film passivation and depassivation. Values of C_w agreed well with the value estimated from the paint film mass and flow tube air volume, and D_f values (also measured using attenuated total reflectance‐Fourier transform infrared spectroscopy) correlated well with VOC vapor saturation concentrations, C*, estimated using a group contribution method. The value of these relationships for estimating key parameters that control VOC partitioning into paint and the fate of VOCs indoors was demonstrated using a house model, which indicated that >50% of VOCs with C* ≤10⁸ μg/m³ (C* of octane, hexanone, and propanol) that contacted a paint film of typical thickness fully permeated the film regardless of emission duration.

中文翻译：

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挥发性有机化合物对涂漆表面的吸收性分配的测量和建模。

分隔到表面是室内挥发性有机化合物（VOC）的重要吸收器，但是其机理尚未得到很好的理解或量化。此处，将质谱仪连接到便携式表面反应器和流量管，以测量VOC在分配到玻璃或墙板上的漆膜中的分配以及它们随后的扩散。模型的开发是为了在膜的有效吸收的有机物质浓度的提取物值Ç_瓦特，这是吸收能力的量度，并且VOC扩散系数，d _˚F，从薄膜的钝化和去钝化过程中所测量的VOC时间曲线。的值Ç_瓦特与从涂膜质量和流管的空气量估计值，和吻合D _f值（也使用衰减全反射傅里叶变换红外光谱法测量）与VOC蒸气饱和度浓度C *相关联，该浓度是通过基团贡献法估算的。这些关系的用于估计关键参数，这些参数控制VOC分割成涂料和挥发性有机化合物在室内的命运是使用房屋模型，这表明VOC的那> 50％，表现出的值C ^ *≤10 ⁸ 微克/米³（C ^ *的辛烷，己酮和丙醇）与典型厚度的漆膜接触后，无论其发射时间长短，都会完全渗透该漆膜。