Application of NIR Analytical Technique in Green Tea’s Quality Control

Abstract

To better control green tea’s quality, brand-name green tea was chosen (green tea with one bud) as the research subject in this study. With the combination of chemical quantitation value for concentrations of tea’s water extract, Near Infrared Reflectance Spectroscopy combined with partial least squares (NIRS-PLS) was used to build a quantitative analysis model for water extract. As shown in results, the Correction Correlation Coefficient (Rc) value of water extract is 0.9547, and the values of Root Mean Square Error of Prediction（RMSEP）is 1.18. Therefore, this method can be used to control the quality of tea in its production. It also accelerates the application and popularization of NIRS analytical technique in tea industry. Furthermore, it attaches great important to the development of tea industry.