四种多组分气体拉曼光谱定量计算方法的对比研究

拉曼光谱检测是一种快速、无损的检测方法，在许多领域得到应用。拉曼光谱气体定量检测过程中采用峰值、峰面积法，应用于产品开发时，会存在很多问题。本文以氧气、氮气、二氧化碳作为研究对象，分别采用峰值峰面积法、瑞利散射归一化、某一种气体成分归一化、待测气体成分整体归一化方法进行定量分析。对4种方法从积分时间的影响、定量检测稳定性、重复性、是否受到体积分数100%约束等方面进行对比研究。结果显示，其他方法相比于峰值、峰面积法均可提升测量的重复性与稳定性。4种方法各有优缺点。产品开发过程中，应该根据需求选择不同的定量计算方法。

Comparative research of four quantitative Raman spectra calculation methods for multi-component gases

Raman spectroscopy is a fast and nondestructive method, which is widely used in many fields. The peak and peak area method cannot meet the needs of product development. The paper took oxygen, nitrogen and carbon dioxide as the research, the quantitative analysis of peak value, peak area method, Rayleigh scattering normalization, a gas component normalization and the whole gas component normalization method were carried out. The four methods were compared in four terms: the influence of integration time, the stability and repeatability of quantitative detection, and whether they were restricted by 100% volume fraction. It is found that other methods can improve the repeatability and stability of measurement compared with peak and peak area method. Each of the four methods has advantages and disadvantages. In the process of product development, different quantitative calculation methods should be selected according to the requirements.