ABSTRACT
This paper was aimed to establish the HPLC fingerprint of Terminalia chebular Retz The analysis was performed on Agilent ZORBAX SB-Aq C18 column (4.6×250 mm, 5 μm) . The mobile phase was 0.1％ phosphate watermethanol solution with gradient elution. The flow rate was 1 mL·min-1. The temperature was maintained at 35℃. The detection wavelength was 270 nm. The injection volume was 20 μL. The chromatographic data of 10 samples was analyzed by similarity of chromatographic data, SPSS software and SIMCA software. The results showed that there were17 common peaks in the diagram. The similarity of 10 samples was between 0.984 and 0.999, which showed that there was no significant difference among these chemical components. The samples were classified into four types according to cluster analysis, which shared the similar results as the principal components analysis (PCA) and partial least sq uares analysis (PLS-DA) . VIP analysis result showed that peak 5 (methyl gallate), 11 and 1 (gallic acid), 10, 12 may be the main chromatographic peaks to identify the samples. It was concluded that chemometrics analysis could be used to analyze, find and distinguish the marker ingredients of Terminalia chebular Retz. This method was accurate and stable, which can provide a reference for the quality control and evaluation of Terminalia chebular Retz.
ABSTRACT
The spectrophotometric method was established for the determination of total tannin content in gardenia medicinal materials and tannins, and HPLC method was applied to simultaneously determine gallic acid, punical glucoside A, methyl gallate, punny glucoside B, corilagin, pentagalloyl glucose and the content of ellagic acid. Taking gallic acid as a reference substance, a phosphomolybdate tungstic acid colorimetric method (Pharmacopoeia method) was used to determine the total tannin content. With the chromatographic column Agilent ZORBAX SB-Aq-C18 (250 × 4.6 mm, 5 microns), mobile phase for phosphoric acid (0.1％), methanol, water flow rate of 1 ml/min, column temperature 30℃, detection wavelength of 270 nm, gradient elution, 7 kinds of component contents in myrobalan medicinal materials were measured at the same time. The result showed that the average content of total tannins of Radix Scutellariae was 30.31％, RSD was 0.55％; the average recovery rate was 99.70％, and the RSD was 21.97％ (n = 6) . In the scorpion medicinal materials, gallic acid, punical glucoside A, punny glucoside B, methyl gallate, punny glucoside B, creatin, pentagalloglucose and ellagic acid have a good linear relationship in their respective ranges. The recovery rate of the sample is between100.10％ and 102.77％. The establishment of the determination method of total tannin, gallic acid, punical glucoside, methyl gallate, corridain, pentagalloglucose and ellagic acid in the scorpion medicinal materials is simple and accurate, which has strong specificity and can be used for quality control of Terminalia chebular.
ABSTRACT
The aim of this work was to identify and analyze the chemical constituents of Terminalia chebular Retz by establishing high performance liquid chromatography-linear ion trap/electrostatic field orbitrap combined high resolution mass spectrometry (HPLC-LTQ-Orbitrap MS) technique. With the application of C18 reverse phase column (4.6 mm×250 mm, 5 μm), gradient elution was performed with methanol and water (0.2％ acetic acid) as mobile phase.In negative ionization mode, the data of LTQ-Orbitrap was collected. Accurate molecular mass of molecular ion peaks and fragment ions provided by the high-resolution mass spectrometry were compared with the literature and the reference substance to determine the possible structure of the compound. The results indicated that 62 compounds from the extract of Terminalia chebular Retz. were identified, including acids and hydrolysable tannins (60), triterpenoids (2) . There were14 compounds were detected from this specie for the first time. It is proved as an effective method to provide reference for Chemical composition mass spectrometry and the quality control in further phytochemical studies of Terminalia chebular Retz.