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Quantitative analysis of metabolic gases by multichannel Raman spectroscopy: use of a newly designed elliptic-spherical integration type of cell holder

机译:通过多通道拉曼光谱对代谢气体进行定量分析:使用新设计的椭圆球形集成型细胞架

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We describe the quantitative analysis of some metabolic gases by multichannel Raman spectroscopy Raman spectra were measured for air, acetone, ammonia, carbon dioxide, and mixed gas consisting of acetone, ammonia, and air. We designed a new elliptic-spherical integration type of cell holder to obtain the Raman spectra of gases with a high signal-to-noise ratio. Concentrations of acetone, ammonia,and carbon dioxide were determined by the peak intensities of Raman bands at 2940, 3228, and 1385 cm250L?-1) respectively. To compensate for the fluctuations of Raman intensities caused by several factors,such as the fluctuations of laser power, the peak intensity of a band at 2324cm↑(-1)due to nitrogen gas was used as an internal intensity standard. The correlation coefficient between the corrected Raman intensity at 2940 cm, ! and the concentration of acetone was calculated to be 0.984 for a concentration range of 2-12 ppm. ,The detection limit of acetone gas was found to be 2 ppm.#1998 Optical Society of America OCIS codes: 300.6450, 300.6170.
机译:我们描述了通过多通道拉曼光谱对一些代谢气体的定量分析,测量了空气,丙酮,氨,二氧化碳和由丙酮,氨和空气组成的混合气体中的拉曼光谱。我们设计了一种新型的椭圆球形集成型细胞固定器,以获得具有高信噪比的气体的拉曼光谱。丙酮,氨和二氧化碳的浓度分别由拉曼谱带的峰值强度在2940、3228和1385cm250L?-1处确定。为了补偿由激光功率的波动等多种因素引起的拉曼强度的波动,将氮气导致的2324cm↑(-1)处的谱带峰值强度作为内部强度标准。 2940 cm处校正拉曼强度之间的相关系数!对于2-12ppm的浓度范围,计算出丙酮的浓度为0.984。 ,丙酮气体的检出限为2 ppm。#1998美国光学学会OCIS代码:300.6450,300.6170。

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