Analysis and evaluation of dynamic accumulation of multiple bioactive constituents in Spatholobi Caulis / 中国中药杂志

A method was established for simultaneous determination of 21 active constituents including flavanols, isoflavones, flavonols, dihydroflavones, dihydroflavonols, chalcones, pterocarpan, anthocyanidins and phenolic acids in Spatholobi Caulis by ultra fast liquid chromatography with triple quadrupole linear ion trap mass spectrometry(UFLC-QTRAP-MS/MS). Then, it was employed to analyze and evaluate the dynamic accumulation of multiple bioactive constituents in Spatholobi Caulis. The chromatographic separation was performed on a XBridge®C_(18)(4.6 mm×100 mm, 3.5 μm) at 30 ℃ with a gradient elution of 0.3% formic acid aqueous solution-methanol, and the flow rate was 0.8 mL·min~(-1), using multiple-reaction monitoring(MRM) mode. A comprehensive evaluation of the multiple bioactive constituents was carried out by gray correlation analysis(GRA). The 21 target components showed good linearity(r>0.999 0) in the range of the tested concentrations. The average recovery rates of the 21 components were from 97.46% to 103.6% with relative standard deviations less than 5.0%. There were differences in the contents of 21 components in Spatholobi Caulis at diffe-rent harvest periods. Spatholobi Caulis had high quality from early November to early December, which is consistent with the local tradi-tional harvest period. This study reveals the rule of the dynamic accumulation of 21 components in Spatholobi Caulis and provides basic information for the suitable harvest time. At the same time, it provides a new method reference for the comprehensive evaluation of the internal quality of Spatholobi Caulis.

Comprehensive evaluation of suitable harvesting period of Acanthopanax Senticosus leaves by multiple indicators / 中草药

Objective: The dynamic changes of eight active constituents and dry weight of Acanthopanax senticosus leaves in different periods were investigated, and the suitable harvesting period of A. senticosus leaves was discussed. Methods: The leaves of A. senticosus were collected at different times, and the dry weight of one hundred leaves was determined by electronic balance. The contents of L-phenylalanine, protocatechuic acid, syringin, chlorogenic acid, caffeic acid, rutin, hyperoside, and quercetin in the leaves of A. senticosus in different periods were determined by HPLC, and the total amount of accumulation of the eight active ingredients was calculated and combined with the analysis results of the principal component analysis method for comprehensive evaluation. Results: The results showed that the vegetative dry weight of A. senticosus increased during the period from S1 to S5, and increased most rapidly in S1-S2. The content of eight active constituents in the leaves of A. senticosus showed dynamic changes in different periods. The content of acid reached the maximum in S1 (June 3); The other seven components reached the maximum in S2 (July 3), and the results of principal component analysis also showed A. senticosus leaves collected in S2. The comprehensive scores of the eight active ingredients in leaves were the highest; The total accumulation of the eight active ingredients in different periods increased first and then decreased. During the period from S1 to S2, the total amount showed an upward trend, and reached the maximum at S2. Conclusion: According to the changes of dry weight and eight active ingredients in A. senticosus leaves in different periods, the best harvest time is around S2 stage (from late June to early July) which provides basic information for determining the suitable harvest time of A. senticosus leaves.

Dynamic changes of metabolite accumulation of Polygoni Multifori Radix based on UPLC-Triple TOF-MS/MS / 中草药

Objective: To analyze the change of chemical constituents of Polygoni Multifori Radix from different harvest time. Methods: Fifteen batches of Polygoni Multifori Radix samples from different harvest time were determined by UPLC-Triple TOF-MS/MS. Through the analysis of the multistage tandem mass spectrometry, the characteristic peaks were extracted with mass spectrometry data peak matching, peak alignment, and noise filtering. Principal component analysis (PCA) and partial least-squares discriminant analysis (PLS-DA) were used for data processing. The components were identified according to a mass spectrometry accurate mass and two mass spectrometry fragmentation information, combined with the software of database search and literature. Results: The chemical composition in Polygoni Multifori Radix samples from different harvest time are clearly distinguished. Twenty-four kinds of differential chemical constituents were identified. Among them, there are nine kinds of common differential constituents which presented different changing laws. Conclusion: This study provides the basic data for revealing the dynamic change law of metabolite accumulation of Polygoni Multifori Radix and confirms its optimal harvest period.

Dynamic accumulation of saponins in Hedera helix / 中草药

Objective: This study detected the contents of four saponins (hederacoside C, hederacoside D, hederacoside D, α-hederin) from different parts of annual cutting Hedera helix in one year growth cycle and analyzed the dynamic accumulation, in order to provide theoretical basis to harvest Hedera helix L. as medicinal raw materials reasonably. Methods: This study designed a reasonable method of collecting materials and detected the contents of saponins by HPLC. Results: The contents of saponins in different parts were as following order: mature leaf > new leaf > stem > root, and four saponins in different parts had different dynamic accumulations in one year growth cycle. Conclusion: The leaf and stem are the reasonable collecting parts of raw materials which have higher medicinal quality. The reasonable collecting time of leaf is the growth stage in March and stem is from March to November before the beginning of dormancy.

Analysis and evaluation of dynamic accumulation of multiple active components in xanthii herba / 中国药学杂志

OBJECTIVE: To develop a method for the determination of phenolic acids, anthraquinones, and flavonoids in Xanthii Herba at different harvest time by UPLC-QTRAP-MS/MS and analyze the dynamic accumulation of multiple active components in Xanthii Herba. METHODS: Chromatographic separation was conducted on an Agilent ZORBAX SB-C18 (4.6 mm×250 mm, 5 μm) column with gradient elution using methanol and 0.2% formic acid as mobile phases. MS analysis was carried out using electrospray ionization in negative MRM mode. Grey related degree was used for the comprehensive evaluation. RESULTS: The calibration curves for the 18 components showed good linearity (r>0.9994) in the range of the tested concentrations. The average recoveries of the 18 components were from 96.96% to 102.55% with relative standard deviations (RSDs) less than 3%. There were differences in the contents of 18 components in Xanthii Herba at different harvest periods. Xanthii Herba had high quality in late July and mid-July. CONCLUSION: This study reveals the rule of the dynamic accumulation of 18 components in Xanthii Herba and provides information for the suitable harvest time.