In this paper, a phenomenological model is presented for the molecular transport across multiple interfaces, involving liquid/gas boundaries or gas/gas phases separated by a thin membrane. A simple rate equation model is proposed on the assumption that diffusion effects in the different phases can be neglected. The model is applied for the characterization of the desorption of acetylene molecules from transformer oil, by wavelength modulation spectroscopy. A semi-quantitative analysis shows that the model yields a good prediction of the time evolution of the desorption process, either for a single or for a double interface configuration. The study originally directed to applications in dissolved gas analysis for surveillance in substations, has broader applicability in the characterization of sorption and desorption processes of other liquid/gas systems.

在本文中，提出了一种现象学模型，用于跨多个界面的分子传输，涉及通过薄膜分隔的液/气边界或气相/气相。提出了一个简单的速率方程模型，其前提是可以忽略不同相中的扩散效应。该模型用于通过波长调制光谱表征变压器油中乙炔分子的解吸。半定量分析表明，该模型对于解吸过程的时间演化（对于单界面配置还是双界面配置）都具有良好的预测。这项研究最初针对的是溶解气体分析在变电站监控中的应用，