Quality evaluation of Qilong Zhuang'er oral liquid based on UHPLC-Q-exactive orbitrap MS and chemometrics analysis / 药学学报

An UHPLC-Q-exactive orbitrap MS method for the simultaneous determination of 19 chemical components in Qilong Zhuang'er oral liquid was established and the quality differences between different batches of samples was compared by chemometric analysis to provide a basis for the quality evaluation of the preparation. The contents of allantoin, L-proline, pyroglutamic acid, hordenine, adenosine, L-phenylalanine, guanosine, L-tryptophan, caffeic acid, calycosin-7-glucoside, verbascoside, isoacteoside, ononin, calycosin, 3-hydroxy-9,10-dimethoxyptercarpan, formononetin, atractylenolide III, atractylenolide II and astragaloside A were analyzed by cluster heat map, principal component analysis (PCA) and partial least squares discriminant analysis (PLS-DA) using Hiplot platform and MarkerlynxXS software to comprehensively evaluate the quality difference of different batches of Qilong Zhuang'er oral liquid. The 19 chemical compounds showed good linearity in their respective concentration ranges (r ≥ 0.999). The RSD of precision, repeatability and stability (24 h) tests were all less than 1.94%. The average recovery was 97.24%-102.75% (RSD < 2.74%, n = 6). The 10 batches of samples were divided into two categories by cluster heat map and PCA analysis. 3-Hydroxy-9,10-dimethoxyptercarpan, atractylenolide III, calycosin, atractylenolide II, formononetin, allantoin and caffeic acid were identified as differential markers by PLS-DA. The established multi component quantitative method of Qilong Zhuang'er oral liquid combined with chemometric analysis can provide reference for the quality evaluation of the preparation.

Analysis on Chemical Constituents in Rhizomes of Bergenia scopulosa by UHPLC-Q Exactive Focus MS/MS / 中国实验方剂学杂志

Objective:Ultra-high performance liquid chromatography coupled with quadrupole/electrostatic field orbital trap high resolution mass spectrometry （UHPLC-Q Exactive Focus MS/MS） was developed to rapidly analyze and identify the chemical components in the rhizomes of <italic>Bergenia scopulosa</italic>. Method:The 75% methanol extract of <italic>B</italic>.<italic> scopulosa</italic> rhizomes was analyzed on a Thermo Accucore aQ RP18 column （2.1 mm×150 mm， 2.6 μm） with the mobile phase of methanol （A） and 0.1% formic acid aqueous solution （B） for gradient elution （0-40 min 5%-95%A， 40-45 min 95%A）， the flow rate was 0.3 mL·min^-1 and the column temperature was at 30 ℃. The information of the chemical constituents was acquired in positive and negative ion modes by heated electrospray ion source （HESI）， and the scanning range was <italic>m</italic>/<italic>z</italic> 80-1 200. Result:A total of 66 chemical constituents were identified， including 2 free amino acids， 7 bergenin derivatives， 15 flavonoids， 15 organic acids， 25 glycosides， and 2 others. Conclusion:The chemical constituents in the rhizomes of <italic>B</italic>.<italic> scopulosa</italic> can be identified systematically， accurately and rapidly by this method. Among them， 8 compounds were unambiguously identified by comparing with reference substances （succinic acid， arbutin， gallic acid， protocatechuic acid， bengenin， catechin， chlorogenic acid and caffeic acid）， 51 compounds were found from <italic>B</italic>.<italic> scopulosa</italic> for the first time and 28 compounds were found from the genus <italic>Bergenia</italic> for the first time. This paper can provide an important basis for the further material basis clarification and quality assessment of <italic>B</italic>.<italic> scopulosa</italic>.

Identification of Chemical Constituents in Caulis of Erycibe schmidtii by UPLC-Q-Exactive Focus-MS/MS / 中国实验方剂学杂志

Objective:To rapidly recognize and identify the chemical constituents in caulis of Erycibe schmidtii by ultra-high performance liquid chromatography coupled with Q-Exactive Focus mass spectrometry (UPLC-Q-Exactive Focus-MS/MS). Method:Taking 80% methanol extract of E. schmidtii caulis as the test solution, the chemical constituents in caulis of E. schmidtii were analyzed and identified. Thermo Accucure aQ C18 column (2.1 mm×150 mm, 2.6 μm) was used for chromatographic separation with the mobile phase of methanol (A)-0.1% formic acid solution (B) for gradient elution (0-12 min, 5%-25%A; 12-20 min, 25%-30%A; 20-28 min, 30%-38%A; 28-40 min, 38%-42%A). Positive and negative ion monitoring modes and heated electrospray ion source (HESI) were used for mass spectrographic analysis. The scanning range was m/z 80-1 200. Result:A total of 42 chemical constituents from caulis of E. schmidtii were identified, including 12 coumarins, 14 chlorogenic acids, 1 tropane alkaloid, 1 amide and 14 esterified glycosides. Conclusion:Chemical constituents in caulis of E. schmidtii can be quickly and fully identified by UPLC-Q-Exactive Focus-MS/MS. Among them, 11 compounds are unambiguously identified by comparing with reference standards, 31 compounds are reported for the first time in this herb, 2 compounds are reported for the first time in Erycibe plants. This paper can provide the important basis for study on pharmacodynamic material base and substitute development of E. schmidtii caulis.

Content Determination of Nine Constituents in Different Medicinal Parts of Pimpinella thellungiana / 中国实验方剂学杂志

Objective:To develop a method to quantify nine constituents in different medicinal parts of Pimpinella thellungiana, in order to compare the content difference of the nine constituents, namely protocatechuic acid,gallic acid,neochlorogenic acid,chlorogenic acid,cryptochlorogenic acid,luteolin-7-O-β-D-glucuronide,isochlorogenic acid A,apigenin-7-O-β-D-glucuronide and isochlorogenic acid C. Method:The analysis was performed on an Agilent TC-C18 column (4.6 mm×250 mm,5 μm) with acetonitrile and mixed acid solution (0.1% phosphoric acid-0.1% glacial acetic acid) as mobile phase for gradient elution. The handover detection wavelengths were at 265 and 325 nm. The column temperature was 20℃, and the flow rate was 1.0 mL·min-1. The experiment data was analyzed using the software of Markerlynx XS. Result:The nine constituents of protocatechuic acid,gallic acid,neochlorogenic acid,chlorogenic acid,cryptochlorogenic acid, luteolin-7-O-β-D-glucuronide,isochlorogenic acid A,apigenin-7-O-β-D-glucuronide and isochlorogenic acid C had a good degree of separation and a good linearity in their respective linear ranges(r>0.999 8). The average recoveries ranged from 99.11% to 100.76%,and the RSD ranged from 0.9% to 2.0% 。The results showed that the contents of the nine constituents had significant differences in different medicinal parts of P. thellungiana. The average contents of the nine constituents were the highest in leaves,which was followed by stem,and the lowest was in root. Conclusion:The study could provide evidence for the quality control,clinical application,and scientific resources utilization of P. thellungiana.