Research on Temperature Disturbance of Glucose Solution With
Two-Trace Two-Dimensional Correlation Spectrum Method
LIU Rong1, 2, WANG Miao-miao1, 2 , SUN Ze-yu1, 2, CHEN Wen-liang1, 2, LI Chen-xi2*, XU Ke-xin1, 2
1. State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China
2. School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China
Abstract：The near-infrared absorption features are easily affected by temperature changes, which reduce the accuracy of quantitative analysis. This paper presents the methods for analysing the source and amplitude of temperature disturbance based on the theory of two-trace two-dimensional correlation spectroscopy (2T2D-COS). The absorption spectra of glucose solution, with a concentration of 0～200 mg·dL-1, are measured in the temperature range of 34~38.5 ℃ with a stepwise of 0.5 ℃. After baseline correction and noise filtering, the concentration-dependent and temperature-dependent spectra are analyzed with the 2T2D-COS algorithm. In the asynchronous spectrum of temperature-dependent spectra, the cross-peaks are observed at 1 474 and 1 410 nm, corresponding to strong and weak hydrogen-bonded water, respectively. While in the asynchronous spectrum of concentration-dependent spectra, the cross peaks at 1 450 and 1 595 nm are related to the characteristic absorption of water and glucose. From the slice spectrum at 1 410 nm, the intensity of the peaks in the range of 1 410n~1 600 nm is increased with temperature, demonstrating good correlation between the cross peaks and temperature variance. The calibration model is established for the quantitative analysis of sample temperature with the cross peak intensity range of (1 475±4) nm. The root mean square error achieved 0.125 9 ℃ for sample temperature prediction with linear regression. The experimental results demonstrate that the temperature disturbances could be identified and qualified with distinctly separate cross peaks in the asynchronous spectrum, obtained using only a pair of spectra. The proposed approach also provides a reasonable way for researchers to simplify the in vivo measurement system and establish a more stable calibration model.
Key words：Two-trace two-dimensional correlation spectroscopy; Temperature disturbance; Near-infrared spectroscopy; Glucose
刘 蓉，王苗苗，孙泽宇，陈文亮，李晨曦，徐可欣. 基于双光谱二维相关谱的葡萄糖溶液温度扰动分析方法研究[J]. 光谱学与光谱分析, 2023, 43(04): 1051-1055.
LIU Rong, WANG Miao-miao , SUN Ze-yu, CHEN Wen-liang, LI Chen-xi, XU Ke-xin. Research on Temperature Disturbance of Glucose Solution With
Two-Trace Two-Dimensional Correlation Spectrum Method. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(04): 1051-1055.
