激光与光电子学进展, 2016, 53 (9): 093001, 网络出版: 2016-09-14
激光拉曼光谱法同步测量液膜厚度与浓度 下载: 975次
Simultaneous Measurement of Film Thickness and Mass Fraction by Raman Spectroscopy
摘要
尿素水溶液液膜厚度和浓度的定量分析对于与其相关的工业过程极为重要,传统的测量方法只能实现厚度和浓度的单独测量。提出了一种基于激光拉曼光谱技术同步测量尿素水溶液液膜厚度和浓度的方法。分别建立尿素水溶液的拉曼光谱特征峰(1004 cm-1,N—C—N对称拉伸振动)相对强度与厚度、浓度的关系曲线,在此基础上建立了尿素水溶液液膜厚度与浓度反演的数学模型。研究结果表明,浓度一定时,强度与厚度(2~10 mm)呈线性关系,厚度的平均测量误差为8.36%;液膜厚度一定时,强度与浓度(5%~40%,质量分数)呈线性相关,浓度的平均测量误差为6.24%。
Abstract
Quantitative analysis of the film thickness and the mass fraction of urea solution is extremely crucial in relevant industrial processes. The traditional method can measure the film thickness or the mass fraction alone independently. A method to simultaneously measure the thickness and the mass fraction of urea solution is proposed based on the Raman spectroscopy. Through setting the standard curves reflecting the dependence of the relative intensity of characteristic Raman peak (1004 cm-1, belonging to N-C-N symmetric stretching vibration) on the thickness and the mass fraction, mathematical models are established to retrieve the film thickness and the mass fraction of the urea solution. The results reveal that the intensity is linearly related to the thickness (2-10 mm) when the solution concentration is constant, and the average measurement error for the film thickness is 8.36%. The intensity is linearly related to the mass fraction (5%-40%) when the film thickness is constant, and the average measurement error for the mass fraction is 6.24%.
王琴, 赵畅, 杨荟楠, 苏明旭, 蔡小舒. 激光拉曼光谱法同步测量液膜厚度与浓度[J]. 激光与光电子学进展, 2016, 53(9): 093001. Wang Qin, Zhao Chang, Yang Huinan, Su Mingxu, Cai Xiaoshu. Simultaneous Measurement of Film Thickness and Mass Fraction by Raman Spectroscopy[J]. Laser & Optoelectronics Progress, 2016, 53(9): 093001.