Objectives To explore the feasibility of terahertz time-domain spectroscopy in measuring moisture content of biscuits and provide a theoretical basis for the development of online devices. Methods In this study, the biscuit wafers with smooth surface ware selected as experimental sample and transmission mode of instrument was used. The moisture content of biscuits were determined by building the linear relationship between the spectrum (including time domain spectra, frequency domain spectra, refractive index and absorption coefficient spectrum) and chemical value. Results The correlation coefficient of partial least squares (PLS) model based on absorption coefficient spectrum was 0.97518 and RMSEP was 0.00595. Conclusion Moisture content in the biscuits can be measured by this technology.
标题：基于太赫兹时域光谱技术的饼干水分定量分析
英文标题：The application of terahertz time domain spectroscopy in measuring moisture content of biscuits
