Spoor Erik, Oerke Viktoria, Rädle Matthias, Repke Jens-Uwe
CeMOS Research and Transfer Center, Mannheim University of Applied Sciences, Paul-Wittsack-Str. 10, 68163 Mannheim, Germany.
Process Dynamics and Operations Group, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany.
Sensors (Basel). 2024 May 15;24(10):3132. doi: 10.3390/s24103132.
In this paper, a dispersion of glass beads of different sizes in an ammonium nitrate solution is investigated with the aid of Raman spectroscopy. The signal losses caused by the dispersion are quantified by an additional scattered light measurement and used to correct the measured ammonium nitrate concentration. Each individual glass bead represents an interface at which the excitation laser is deflected from its direction causing distortion in the received Raman signal. It is shown that the scattering losses measured with the scattered light probe correlate with the loss of the Raman signal, which means that the data obtained can be used to correct the measured values. The resulting correction function considers different particle sizes in the range of 2-99 µm as well as ammonium nitrate concentrations of 0-20 wt% and delivers an of 1.952 wt%. This correction provides easier process access to dispersions that were previously difficult or impossible to measure.
本文借助拉曼光谱研究了不同尺寸的玻璃珠在硝酸铵溶液中的分散情况。通过额外的散射光测量对由分散引起的信号损失进行量化，并用于校正所测量的硝酸铵浓度。每个单独的玻璃珠都代表一个界面，在该界面处激发激光会偏离其方向，从而导致接收到的拉曼信号失真。结果表明，用散射光探头测量的散射损失与拉曼信号的损失相关，这意味着所获得的数据可用于校正测量值。所得的校正函数考虑了2 - 99 µm范围内的不同颗粒尺寸以及0 - 20 wt%的硝酸铵浓度，给出的校正值为1.952 wt%。这种校正为以前难以或无法测量的分散体提供了更便捷的测量方法。
