[Correlation Analysis Between Common Peaks of Angelica sinensis HPLC Fingerprint and Mineral Elements in Its Growing Soil].

Objective: To investigate the correlation between common peaks of Angelica sinensis HPLC fingerprint and mineral elements in its growing soil.

Methods: The fingerprints of 120 batches of Angelica sinensis from 12 habitats were determined by HPLC. The contents of Pb, As, Cr, Sb, Hg, Cu, Cd, Ni, Zn, Mg, Mn, Ca, Fe, Na and K in corresponding soil were determined by ICP-MS and AAS.

[NIR Fingerprints of Different Medicinal Parts of Angelicae Sinensis Radix].

Objective: To investigate the spectrum characteristics of near-intrared dittuse retlectance spectroscopy (NIR) fingerprint of different medicinal parts of Angelicae Sinensis Radix.

Methods: 96 batches of samples were collected from 14 counties of Gansu Province and Yunnan Province. The NIR fingerprints were collected by integrated sphere.

[Study on mineral elements distribution in soil of Angelica sinensis producing regions and its relationship with altitude and soil types].

Objective: To investigate the distribution characteristics of mineral elements in the soil of Angelica sinensis producing regions and its relationship with altitude and soil types.

Methods: The contents of 15 mineral elements in 103 batches of soil from 13 counties were determined by ICP-MS or AAS. Pearson correlation analysis, partial correlation analysis and systematical cluster analysis were used to analyze the data.

TD-DFT study on the excited-state proton transfer in the fluoride sensing of a turn-off type fluorescent chemosensor based on anthracene derivatives.

The sensing mechanism for fluoride chemosensor based on anthracene structure has been investigated by DFT and TDDFT methods. The results show that the similar geometries in S(0) and S(1) states in the absence of the fluoride anion induce the local excited (LE) state over the anthracene moiety, which is responsible for the strong fluorescence. The fluorescence quenching phenomenon for F-coordinated complex can be explained by the photoinduced electron transfer (PET) process from benzylic amide to anthracene moiety.