A smart spectral analysis strategy-based UV and FT-IR spectroscopy fingerprint: Application to quality evaluation of compound liquorice tablets

Quality grade evaluation and related antioxidant activity research of different medicinal parts of Catalpa fruit

“…2.5 Theory of the SQFM [30][31][32][33] The principle of the SQFM was proposed by Professor Guoxiang Sun. The SQFM is a method of macro-qualitative analysis and overall quantitative analysis of the ngerprint system, which has good applicability and compatibility.…”

Reliability evaluation of traditional Chinese medicine fingerprints combined with qualitative and quantitative analysis and antioxidant activity to comprehensively evaluate the quality of Citri Reticulatae Pericarpium

“…a is the coefficient of variation of fingerprint homogenization, which is the original uncertainty arising from the qualitative and quantitative evaluation of the single batch fingerprints. Due to the transfer of the uncertainty of RFP itself, the ratio of the qualitative uncertainty U ri and the equal-weighted content uncertainty U pi are used to describe the uncertainty of the quantitative distribution of a single batch of chemical fingerprints and the uncertainty of the overall content of a single batch of chemical fingerprints, eqn (19) and (20). The ratio of qualitative reliability SR ri and the equal-weighted content reliability PR pi are shown in eqn ( 21) and (22), respectively.…”

“…The UV spectral points were reduced from 102 points to 24 points by selecting merge point 3, highlighting potential features while simplifying the data points. 24 light signal cumulative areas were obtained from UV-QTFP and used to assess the correlation between P r % of the UV spectra of 60 batches of samples and the average percentage of the 24 light signal cumulative areas (P A %), 19 eqn (26) and ( 27). The OPLS method was used to establish the correlation between P r % and P A %, and the results showed that the correlation coefficient R was 0.9956, and the RMSEE and RMSEcv were 1.67975 and 1.70436, respectively, as shown in Fig.…”

Multiple fingerprints and quantitative analysis for comprehensive quality evaluation of Citri reticulatae pericarpium within different storage years

“…[13][14][15] In complex sample analysis, ultraviolet (UV) spectra reflect the overall absorbance characteristics of unsaturated bonds of components with conjugated and aromatic systems. 16 There is a certain relationship between absorbance and chemical composition content based on the Beer-Lambert law. 17 It can be an effective tool for the qualitative and quantitative analysis of TCM and is widely used in research.…”