化学
化学成像
光谱学
碳酸钙
太赫兹辐射
分析化学(期刊)
钙
太赫兹光谱与技术
吸光度
基质(化学分析)
热重分析
材料科学
色谱法
光电子学
有机化学
无机化学
遥感
量子力学
高光谱成像
地质学
物理
作者
Andreja Abina,Uroš Puc,A. Jeglic,Jana Prah,Rimvydas Venckevičius,Irmantas Kašalynas,Gintaras Valušis,Aleksander Zidanšek
出处
期刊:Talanta
[Elsevier]
日期:2015-10-01
卷期号:143: 169-177
被引量:13
标识
DOI:10.1016/j.talanta.2015.05.027
摘要
In different industrial applications, several strictly defined parameters of calcium-based microfillers such as average particle size, particle size distribution, morphology, specific surface area, polymorphism and chemical purity, play a key role in the determination of its usefulness and effectiveness. Therefore, an analytical tool is required for rapid and non-destructive characterization of calcium-based microfillers during the synthesis process or before its use in a further manufacturing process. Since spectroscopic techniques are preferred over microscopy and thermogravimetry, particularly due to its non-destructive nature and short analysis time, we applied terahertz (THz) spectroscopy to analyse calcite microfillers concentration in polymer matrix, its granulation and chemical treatment. Based on the analysis of peak absorbance amplitude, peak frequency position, and the appearance of additional spectral features, quantitative and qualitative analysis was successfully achieved. In addition, THz imaging was also applied for both quantitative and qualitative analysis of calcium-based microfillers. By using spatial distribution map, the inhomogeneity in concentration of calcium carbonate in polymer matrix was characterized. Moreover, by THz spectroscopy and imaging different calcium compounds were detected in binary mixtures. Finally, we demonstrated that the applied spectroscopic technique offers valuable results and can be, in combination with other spectroscopic and microscopic techniques, converted to a powerful rapid analytical tool.
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