Rapid Evaluation of the Quality of Rhododendri Daurici Folium by AOTF-NIR

OBJECTIVE To establish a rapid method for the quality evaluation of Rhododendri Daurici Folium. METHODS The contents of moisture, total ash, acid insoluble ash and farrerol were measured with the 2015 edition of Chinese Pharmacopoeia(as a reference). The herbs were analyzed by The Unscrambler program. Quantitative analytical models invoking the partial least square and the cross-validation algorithm simultaneously predicted the contents of four major indexes (as a prediction). RESULTS The Cross-validation correlation coefficient of moisture, total ash, acid insoluble ash and farrerol were 0.928 6, 0.918 5, 0.957 6 and 0.928 9. Root Mean Square Error of Calibration(RMSEC) of the correction set were 0.087 5, 0.144 7, 0.012 8 and 0.003 2, and the root mean square error of prediction(RMSEP) were 0.305 5, 0.232 1, 0.016 0 and 0.004 9; The external validation deviations were 1.01%, 1.46%, 2.65% and 3.64%. CONCLUSION The method is rapid, accurate, simple and pollution-free, and can be used for rapid evaluation of the quality of Rhododendri Daurici Folium.