University of Applied Sciences Aschaffenburg, Würzburger Strasse 45, D-63743 Aschaffenburg, Germany.
Sensors (Basel). 2012;12(2):2018-25. doi: 10.3390/s120202018. Epub 2012 Feb 13.
We report an optical refractive index sensor system based on a planar Bragg grating which is functionalized by substituted γ-cyclodextrin to determine low concentrations of naphthalene in solvent vapor. The sensor system exhibits a quasi-instantaneous shift of the Bragg wavelength and is therefore capable for online detection. The overall shift of the Bragg wavelength reveals a linear relationship to the analyte concentration with a gradient of 12.5 ± 1.5 pm/ppm. Due to the spectral resolution and repeatability of the interrogation system, this corresponds to acquisition steps of 80 ppb. Taking into account the experimentally detected signal noise a minimum detection limit of 0.48 ± 0.05 ppm is deduced.
我们报告了一种基于平面布拉格光栅的光折射指数传感器系统，该系统通过取代的 γ-环糊精功能化，用于测定溶剂蒸气中萘的低浓度。该传感器系统表现出布拉格波长的准瞬时移动，因此能够进行在线检测。布拉格波长的整体移动与分析物浓度呈线性关系，斜率为 12.5 ± 1.5 pm/ppm。由于询问系统的光谱分辨率和可重复性，这对应于 80 ppb 的采集步骤。考虑到实验检测到的信号噪声，推断出的最小检测限为 0.48 ± 0.05 ppm。
