LONG Ruo-lan,FENG Dan,LUO Xi,et al.Online Near Infrared Quality Control on Extraction Process of Tibetan Medicine Meconopsis Quintuplinervia Regel.[J].Journal of Instrumental Analysis,2023,42(08):920-929.
LONG Ruo-lan,FENG Dan,LUO Xi,et al.Online Near Infrared Quality Control on Extraction Process of Tibetan Medicine Meconopsis Quintuplinervia Regel.[J].Journal of Instrumental Analysis,2023,42(08):920-929. DOI: 10.19969/j.fxcsxb.23050906.
Online Near Infrared Quality Control on Extraction Process of Tibetan Medicine Meconopsis Quintuplinervia Regel.
A near infrared spectroscopy with self-built online detection system was developed for the online detection of total flavonoids and the end-point determination in the extraction process of ,Meconopsis quintuplinervia, Regel.in this paper.Total 403 samples were used as the modeling set to obtain the best pretreatment methods and modeling bands for principal component regression(PCR),partial least squares(PLS),decision tree(DT),and random forest(RF) algorithms,respectively.And the best modeling method was selected with the ration of prediction to deviation(RPD) value as the index.The feasibility for the assay model applied to real-time monitoring of total flavonoids content was investigated with 62 samples as an external validation set.In addition,the feasibility for direct determination of the extraction end-point by relative concentration changing rate(RCCR) analysis was also investigated using the model prediction values.Futhermore,the suitabilities for the determination of extraction endpoints by the absolute distance of standard deviation(ADSD) and moving block standard deviation(MBSD) method were compared.The results showed that the PLS model constructed under the pretreatment method Constant + first derivative + Savitzky-Golay smoothing and the modeling bands 5 300-9 000 cm,-1, had the best results,which had the root mean squared errors for calibration and validation both less than 0.14,correlation coefficients for calibration and validation both greater than 0.97,and a RPD value of 4.68.The average prediction rate of the constructed PLS model for unknown samples was 79%,the correlation coefficient between the actual and predicted values was greater than 0.98,which meant that the model had a good prediction effect.The prediction extraction end-points determined by both RCCR and ADSD methods in the external validation sets were consistent with the actual end-point of 84 min.It can be seen that the performance of the proposed model was good enough.The real-time monitoring of the total flavonoids content in the extraction process of ,Meconopsis quintuplinervia, Regel.was achieved through the accurate and rapid quantitative analysis of the unknown samples,and the determination methods with RCCR and ADSD as the extraction endpoint were accurate enough.This paper provided a reliable reference for the application of online near infrared spectroscopy in the extraction process of Tibetan herbal medicine.
关键词
近红外光谱技术质量控制在线检测五脉绿绒蒿总黄酮
Keywords
near infrared spectroscopyquality controlonline detectionMeconopsis quintuplinervia Regel.total flavonoids
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