Since the mathematical foundations of photothermal effects in condensed phase materials were established in the middle 1970s, new photothermal methodologies have emerged based on the detection of heat generated from the absorption and non-radiative conversion of modulated radiation. Among them, photopyroelectric techniques have become very popular and widely used for a variety of studies ranging from calorimetry (photothermal calorimetry), phase transitions and the measurement of thermophysical (thermal diffusivity, effusivity and conductivity) and optical properties (photopyroelectric spectroscopy). More recently photopyroelectric detection has been used for the direct quantification of the optical absorption coefficient of condensed phase materials and has demonstrated its potential for quantitative analysis. In this work, a survey of various applications of photopyroelectric detection for the analysis of fluids and liquid mixtures is presented with special focus on theoretical and experimental progress in quantitative analytical measurements as new developments in this field.

中文翻译：

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纯流体和液体混合物的光电光谱：基础和最先进的应用

自从 1970 年代中期建立了凝聚相材料中光热效应的数学基础以来，基于对调制辐射的吸收和非辐射转换产生的热量的检测，出现了新的光热方法。其中，光热释电技术已变得非常流行，并广泛用于各种研究，包括量热法（光热量热法）、相变以及热物理（热扩散率、扩散率和电导率）和光学特性（光热电光谱）的测量。最近，光热释电检测已用于直接量化凝聚相材料的光吸收系数，并证明了其在定量分析方面的潜力。在这项工作中，