Simultaneous Determination of Seven Bioactive Components in Oolong Tea Camellia sinensis: Quality Control by Chemical Composition and HPLC Fingerprints

Wang, Yixiang; Li, Qing; Wang, Qian; Li, Yujiao; Ling, Junhong; Liu, Lili; Chen, Xiaohui; Bi, Kaishun

doi:10.1021/jf204312w

Cited by 60 publications

(37 citation statements)

References 21 publications

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“…The main phenolics in tea extracts are gallic acid (GA), epigallocatechin (EGC), epigallocatechin gallate (EGCG), epicatechin (EC), caffeine (CA), epicatechin gallate (ECG) ( Table 1), which was similar to the previous report in oolong tea (Wang et al, 2012).…”

Section: Oxygen Radical Absorbance Capacity Of Different Teassupporting

confidence: 87%

Effects of addition of egg ovotransferrin-derived peptides on the oxygen radical absorbance capacity of different teas

et al. 2012

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Section: Oxygen Radical Absorbance Capacity Of Different Teassupporting

confidence: 87%

Effects of addition of egg ovotransferrin-derived peptides on the oxygen radical absorbance capacity of different teas

et al. 2012

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“…Discriminant analysis is a common supervised learning method, and it is a classification method for samples based on a set of variables known as predictors or input variables (Barreira, Ferreira, and Oliveira 2012; Y. X. Wang et al 2011); Wilks' lambda is used to measure how well each function separates samples (Forsythia suspena) into groups (Mokhatab Rafie, Manzari,…”

Section: Chemometricsmentioning

confidence: 99%

“…Wang et al 2011) was used to investigate the classification of the Forsythia suspensa samples on the basis of their different growing origins. The discriminant functions obtained with the use of the DA method were:…”

Section: Discriminant Analysis Of Chromatographic Datamentioning

confidence: 99%

A High Performance Liquid Chromatography and Electrospray Ionization Mass Spectrometry Method for the Analysis of the Natural Medicine,Forsythia Suspensa

Zhuang

Kokot

2013

Analytical Letters

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Samples of Forsythia suspensa from raw (Laoqiao) and ripe (Qingqiao) fruit were analyzed with the use of HPLC-DAD and the EIS-MS techniques. Seventeen peaks were detected, and of these, twelve were identified. Most were related to the glucopyranoside molecular fragment. Samples collected from three geographical areas (Shanxi, Henan and Shandong Provinces), were discriminated with the use of hierarchical clustering analysis (HCA), discriminant analysis (DA), and principal component analysis (PCA) models, but only PCA was able to provide further information about the relationships between objects and loadings; eight peaks were related to the provinces of sample origin. The supervised classification models-K-nearest neighbor (KNN), least squares support vector machines (LS-SVM), and counter propagation artificial neural network (CP-ANN) methods, indicated successful classification but KNN produced 100% classification rate. Thus, the fruit were discriminated on the basis of their places of origin.

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“…1 (Chen et al 2010). The determinations of catechins in oolong tea have been previously reported using an external standard method with HPLC on reversed phase chromatographic columns coupled to a UV-absorbance detector (Rahim et al 2014;Wang et al 2012;Zuo et al 2002;Yi et al 2015). However, due to the inadequate supply and high price of standard substances, the application of external standard method was limited for multi-component determination in practice.…”

Section: Introductionmentioning

confidence: 99%

Determination of Contents of Catechins in Oolong Teas by Quantitative Analysis of Multi-components Via a Single Marker (QAMS) Method

Xie

Liang

et al. 2016

Food Anal. Methods

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The catechins in oolong tea are related to its flavor and health benefits. In this paper, a new strategy for a quantitative analysis of multi-components via a single marker (QAMS) was developed and validated to analyze six catechins (epigallocatechin, catechin, epicatechin, epigallocatechin gallate, gallocatechin gallate, and epicatechin gallate) in oolong tea by HPLC. Catechin was chosen as the internal reference substance. The relative correction factors (RCFs) between catechin and the other five catechins were investigated for the QAMS calculation using five different types of chromatographic columns. Meanwhile, the content of each of the six analytes was also determined by a conventional external standard method. Finally, the angle cosine value revealed that there was no significant difference between the QAMS method and the external standard method. The QAMS method established in this study solved the problem of the availability and high cost of some standard substances and would be useful for providing an efficient and feasible quality assessment method for oolong tea and other botanic samples.

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Simultaneous Determination of Seven Bioactive Components in Oolong Tea Camellia sinensis: Quality Control by Chemical Composition and HPLC Fingerprints

Cited by 60 publications

References 21 publications

Effects of addition of egg ovotransferrin-derived peptides on the oxygen radical absorbance capacity of different teas

Effects of addition of egg ovotransferrin-derived peptides on the oxygen radical absorbance capacity of different teas

A High Performance Liquid Chromatography and Electrospray Ionization Mass Spectrometry Method for the Analysis of the Natural Medicine,Forsythia Suspensa

Determination of Contents of Catechins in Oolong Teas by Quantitative Analysis of Multi-components Via a Single Marker (QAMS) Method

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