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Kinetic Study on Chlorophyll and Antioxidant Activity from Polyscias fruticosa (L.) Harms Leaves via Microwave-Assisted Extraction. Molecules 2021; 26:molecules26123761. [PMID: 34205529 PMCID: PMC8235075 DOI: 10.3390/molecules26123761] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 05/30/2021] [Accepted: 06/02/2021] [Indexed: 11/16/2022] Open
Abstract
Polyscias fruticosa (L.) leaves contain significant bioactive compounds with high antioxidant activity such as chlorophylls, total polyphenols, etc. but these have still been underutilized. In this study, the kinetics of chlorophyll and antioxidant activity extraction from P. fruticosa leaves by microwave-assisted extraction (MAE) were investigated. Microwave power was 300, 450, or 600 (W); the ratio of material/solvent varied from 1:40 to 1:80 (g/mL). In this study, the second-order kinetic model successfully predicted the change of chlorophyll and antioxidant activity during MAE. The increase of microwave power or/and the solvent amount increased saturated extraction efficiency and the extraction rate constant. However, the saturated concentration of chlorophyll and antioxidant activity increased with the increment of microwave power and the decrease in solvent amount.
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Li Y, Li S, Lin SJ, Zhang JJ, Zhao CN, Li HB. Microwave-Assisted Extraction of Natural Antioxidants from the Exotic Gordonia axillaris Fruit: Optimization and Identification of Phenolic Compounds. Molecules 2017; 22:E1481. [PMID: 28878178 PMCID: PMC6151393 DOI: 10.3390/molecules22091481] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Revised: 08/30/2017] [Accepted: 09/03/2017] [Indexed: 01/01/2023] Open
Abstract
Our previous study reported that the fruit of Gordonia axillaris , an edible wild fruit, possessed strong antioxidant activity. In this study, a microwave-assisted extraction (MAE) method was established to extract antioxidants from the fruit of Gordonia axillaris . The influence of five parameters, including ethanol concentration, solvent/material ratio, extraction time, extraction temperature and microwave power, was investigated by single-factor experiments. Three factors, namely ethanol concentration, solvent/material ratio, extraction time, were found to exert a major influence on extraction efficacy, and were further studied by response surface methodology to investigate their interactions. Ethanol concentration of 36.89%, solvent/material ratio of 29.56 mL/g, extraction time of 71.04 min, temperature of 40 °C, and microwave power of 400 W were found to be the optimal condition. The TEAC value was 198.16 ± 5.47 µmol Trolox/g DW under the optimal conditions, which was in conformity to the predicted value (200.28 µmol Trolox/g DW). In addition, the MAE method was compared with two conventional methods (Soxhlet extraction and maceration extraction). Results showed that the antioxidant capacity of the extract obtained by MAE method was stronger than that obtained by maceration (168.67 ± 3.88 µmol Trolox/g DW) or Soxhlet extraction (114.09 ± 2.01 µmol Trolox/g DW). Finally, several phenolic compounds in the extract were identified and quantified by UPLC-MS/MS, which were rutin, gallic acid, protocatechuic acid, epicatechin, epicatechin gallate, 2-hydrocinnamic acid, p -coumaric acid, quercetin, chlorogenic acid and ferulic acid.
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Affiliation(s)
- Ya Li
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Nutrition, School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China.
| | - Sha Li
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong 999077, China.
| | - Sheng-Jun Lin
- Zhongshan Center for Disease Control and Prevention, Zhongshan 528403, China.
| | - Jiao-Jiao Zhang
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Nutrition, School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China.
| | - Cai-Ning Zhao
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Nutrition, School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China.
| | - Hua-Bin Li
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Nutrition, School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China.
- South China Sea Bioresource Exploitation and Utilization Collaborative Innovation Center, Sun Yat-Sen University, Guangzhou 510006, China.
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Guo YX, Shi CZ, Zhang L, Lv L, Zhang YY. Extraction and isolation of lithospermic acid B from Salvia miltiorrhiza Bunge using aqueous two-phase extraction followed by high-performance liquid chromatography. J Sep Sci 2016; 39:3624-30. [PMID: 27484287 DOI: 10.1002/jssc.201600368] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Revised: 07/17/2016] [Accepted: 07/22/2016] [Indexed: 12/22/2022]
Abstract
A rapid and effective method integrating separation and purification of lithospermic acid B from Salvia miltiorrhiza Bunge was developed by combining an aqueous two-phase system extraction with preparative chromatography. An aqueous two-phase system of n-butyl alcohol/KH2 PO4 was chosen from seven systems. The influence of parameters including concentration of KH2 PO4 , n-butyl alcohol concentration, pH, and the ratio of an aqueous two-phase system to crude extract were investigated using a single factor design. Response surface methodology was subsequently used to find the optimal compositions of an aqueous two-phase system. Keeping a solvent-to-solid ratio of 10, the final optimized composition of an aqueous two-phase system was 39.1% w/w n-butyl alcohol and 22.6% w/w KH2 PO4 . Under these conditions a recovery yield of 99.8% and a high partition coefficient of 310.4 were obtained. In a pilot-scale experiment using optimized conditions, 18.79 g of lithospermic acid B with a purity of 70.5% and in a yield of 99.8% was separated from 0.5 kg of crude extract. Subsequently, 9.94 g lithospermic acid B with a purity of 99.3% and recovery yield of 70.3% was obtained with a preparative chromatographic process, and the two-step total recovery was 70.1%.
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Affiliation(s)
- Yong Xue Guo
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang, P. R. China.
| | - Chang Zhi Shi
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang, P. R. China
| | - Lei Zhang
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang, P. R. China
| | - Lin Lv
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang, P. R. China
| | - Yue Yong Zhang
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang, P. R. China
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Xu H, Zhan L, Zhang L. Comparison of microwave-assisted and heat reflux extraction techniques for the extraction of ten major compounds from Zibu Piyin Recipe using ultra high performance liquid chromatography with tandem mass spectrometry. J Sep Sci 2016; 39:1009-15. [DOI: 10.1002/jssc.201501033] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 12/16/2015] [Accepted: 12/17/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Huiying Xu
- Department of Traditional Chinese Medicine, The Second Affiliated Hospital; Dalian Medical University; Dalian China
| | - Libin Zhan
- School of Basic Medical Sciences; Nanjing University of Chinese Medicine; Nanjing China
| | - Lin Zhang
- Institute of Integrative Medicine; Dalian Medical University; Dalian China
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Taamalli A, Arráez-Román D, Abaza L, Iswaldi I, Fernández-Gutiérrez A, Zarrouk M, Segura-Carretero A. LC-MS-based metabolite profiling of methanolic extracts from the medicinal and aromatic species Mentha pulegium and Origanum majorana. PHYTOCHEMICAL ANALYSIS : PCA 2015; 26:320-30. [PMID: 25982347 DOI: 10.1002/pca.2566] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 02/17/2015] [Accepted: 04/09/2015] [Indexed: 05/14/2023]
Abstract
INTRODUCTION There has been increasing interest dedicated to the phenolic compounds with a view to their antioxidant and healthy properties. Recent studies have focused on plants from the Lamiaceae family with special interest in phenolic compounds antioxidant potential. OBJECTIVE The metabolite profile of methanolic extracts from two Lamiacea medicinal plants was investigated. MATERIALS AND METHODS Mentha pulegium and Origanum majorana methanolic extracts were analysed using reversed-phase ultra-high-performance liquid chromatography (RP-UHPLC) coupled to electrospray ionisation quadrupole time-of-flight mass spectrometry (ESI-QTOF-MS) detection in the negative ion mode. RESULTS A total of 85 metabolites were characterised from different families, such as organic acids and derivatives, amino acids and derivatives, nucleosides, phenolic compounds as well as other polar metabolites, by using the MS and MS/MS information provided by the QTOF-MS. However, the total phenols and flavonoids were also quantified spectrophotometrically and they registered higher amounts in Mentha pulegium than in Origanum majorana extract. Gallocatechin was the major compound in M. pulegium extract whereas quercetin dimethyl ether, jaceidin and dihydrokaempferide were the major ones in O. majorana extract. CONCLUSION The distribution of phenolic compounds in the methanolic extract showed a variation among studied plants. Mentha pulegium can be considered as a source of gallocatechin.
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MESH Headings
- Catechin/analogs & derivatives
- Catechin/analysis
- Catechin/chemistry
- Catechin/isolation & purification
- Chromatography, High Pressure Liquid/methods
- Chromatography, Liquid/methods
- Chromatography, Reverse-Phase/methods
- Hydrocarbons, Aromatic/analysis
- Hydrocarbons, Aromatic/chemistry
- Hydrocarbons, Aromatic/isolation & purification
- Mass Spectrometry/methods
- Mentha pulegium/chemistry
- Mentha pulegium/metabolism
- Methanol/chemistry
- Origanum/chemistry
- Origanum/metabolism
- Plant Components, Aerial/chemistry
- Plant Components, Aerial/metabolism
- Plant Extracts/analysis
- Plant Extracts/chemistry
- Plant Extracts/isolation & purification
- Plants, Medicinal/chemistry
- Plants, Medicinal/metabolism
- Quercetin/analysis
- Quercetin/chemistry
- Quercetin/isolation & purification
- Species Specificity
- Spectrometry, Mass, Electrospray Ionization/methods
- Triterpenes/analysis
- Triterpenes/chemistry
- Triterpenes/isolation & purification
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Affiliation(s)
- Amani Taamalli
- Laboratoire de Biotechnologie de l'Olivier, Centre de Biotechnologie de Borj Cedria, BP 901, 2050, Hammam-Lif, Tunisia
| | - David Arráez-Román
- Department of Analytical Chemistry, University of Granada, Avda. Fuentenueva s/n, 18071, Granada, Spain
- Functional Food Research and Development Centre (CIDAF), Health-Science Technological Park, Avda. Del Conocimiento 3, 18016, Granada, Spain
| | - Leila Abaza
- Laboratoire de Biotechnologie de l'Olivier, Centre de Biotechnologie de Borj Cedria, BP 901, 2050, Hammam-Lif, Tunisia
| | - Ihsan Iswaldi
- Food Technology Study Programme, Life Sciences Faculty, Surya University, Gedung 01 Scientia Business Park, Jl. Boulevard Gading Serpong Blok O/1, SummareconSerpong, Tangerang, 15810, Banten, Indonesia
- Centre for Functional Food, Surya University, Gedung 01 Scientia Business Park, Jl. Boulevard Gading Serpong Blok O/1, Summarecon Serpong, Tangerang, 15810, Banten, Indonesia
| | - Alberto Fernández-Gutiérrez
- Department of Analytical Chemistry, University of Granada, Avda. Fuentenueva s/n, 18071, Granada, Spain
- Functional Food Research and Development Centre (CIDAF), Health-Science Technological Park, Avda. Del Conocimiento 3, 18016, Granada, Spain
| | - Mokhtar Zarrouk
- Laboratoire de Biotechnologie de l'Olivier, Centre de Biotechnologie de Borj Cedria, BP 901, 2050, Hammam-Lif, Tunisia
| | - Antonio Segura-Carretero
- Department of Analytical Chemistry, University of Granada, Avda. Fuentenueva s/n, 18071, Granada, Spain
- Functional Food Research and Development Centre (CIDAF), Health-Science Technological Park, Avda. Del Conocimiento 3, 18016, Granada, Spain
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Cao J, Wei J, Tian K, Su H, Wan J, Li P. Simultaneous determination of seven phenolic acids in three Salvia species by capillary zone electrophoresis with β-cyclodextrin as modifier. J Sep Sci 2014; 37:3738-44. [PMID: 25296843 DOI: 10.1002/jssc.201400845] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 09/25/2014] [Accepted: 09/29/2014] [Indexed: 12/31/2022]
Abstract
A capillary zone electrophoresis method was developed for the simultaneous determination of seven phenolic acids, including protocatechuic aldehyde (1), salvianolic acid C (2), rosmarinic acid (3), salvianolic acid A (4), danshensu (5), salvianolic acid B (6), and protocatechuic acid (7), in Danshen and related medicinal plants. A running buffer composed of 20 mM sodium tetraborate adjusted to pH 9.0, and containing 12 mM β-cyclodextrin as modifier. Baseline separation was achieved within 17 min running at the voltage of 20 kV, temperature of 25°C and detection wavelength of 280 nm. The relative standard deviations of migration time ranged from 0.2 to 0.7% and the peak area ranged from 1.5 to 3.7% for the seven analytes, indicating the good repeatability of the proposed method. The method was extensively validated by evaluating the linearity (R(2) ≥ 0.9992), limits of detection (0.14-0.36 μg/mL), limits of quantification (0.47-1.19 μg/mL), and recovery (96.0-102.6%). Under the optimum conditions, samples of Danshen and related medicinal plants were analyzed using the developed method with high separation efficiency.
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Affiliation(s)
- Jiliang Cao
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
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Arceusz A, Wesolowski M, Konieczynski P. Methods for Extraction and Determination of Phenolic Acids in Medicinal Plants: A Review. Nat Prod Commun 2013. [DOI: 10.1177/1934578x1300801238] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Phenolic acids constitute a group of potentially immunostimulating compounds. They occur in all medicinal plants and are widely used in phytotherapy and foods of plant origin. In recent years, phenolic acids have attracted much interest owing to their biological functions. This paper reviews the extraction and determination methods of phenolic acids in medicinal plants over the last 10 years. Although Soxhlet extraction and ultrasonic assisted extraction (UAE) are commonly used for the extraction of phenolic acids from plant materials, alternative techniques such as supercritical fluid extraction (SFE), and accelerated solvent extraction (ASE) can also be used. After extraction, phenolic acids are determined usually by liquid chromatography (LC) owing to the recent developments in this technique, especially when it is coupled with mass spectrometry (MS). Also detection systems are discussed, including UV-Vis, diode array, electrochemical and fluorimetric. Other popular techniques for the analysis of this group of secondary metabolites are gas chromatography coupled with mass spectrometry (GC-MS) and capillary electrophoresis (CE).
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Affiliation(s)
- Agnieszka Arceusz
- Department of Analytical Chemistry, Medical University of Gdansk, 80-416 Gdansk, Poland
| | - Marek Wesolowski
- Department of Analytical Chemistry, Medical University of Gdansk, 80-416 Gdansk, Poland
| | - Pawel Konieczynski
- Department of Analytical Chemistry, Medical University of Gdansk, 80-416 Gdansk, Poland
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Fang X, Wang Y, Wang J, Zhang J, Wang X. Microwave-assisted extraction followed by RP-HPLC for the simultaneous extraction and determination of forsythiaside A, rutin, and phillyrin in the fruits of Forsythia suspensa. J Sep Sci 2013; 36:2672-9. [DOI: 10.1002/jssc.201300317] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2013] [Revised: 05/25/2013] [Accepted: 05/27/2013] [Indexed: 12/12/2022]
Affiliation(s)
- Xinsheng Fang
- State Key Laboratory of Crop Biology, College of Agronomy; Shandong Agricultural University; Taian China
- Shandong Key Laboratory of Crop Biology, College of Agronomy; Shandong Agricultural University; Taian China
| | - Yingzi Wang
- School of Chinese Materia Medica; Beijing University of Traditional Chinese Medicine; Beijing China
| | - Jianhua Wang
- State Key Laboratory of Crop Biology, College of Agronomy; Shandong Agricultural University; Taian China
- Shandong Key Laboratory of Crop Biology, College of Agronomy; Shandong Agricultural University; Taian China
| | - Jin Zhang
- State Key Laboratory of Crop Biology, College of Agronomy; Shandong Agricultural University; Taian China
- Shandong Key Laboratory of Crop Biology, College of Agronomy; Shandong Agricultural University; Taian China
| | - Xin Wang
- State Key Laboratory of Crop Biology, College of Agronomy; Shandong Agricultural University; Taian China
- Shandong Key Laboratory of Crop Biology, College of Agronomy; Shandong Agricultural University; Taian China
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Wu Z, Ruan H, Wang Y, Chen Z, Cui Y. Optimization of Microwave-Assisted Extraction of Puerarin fromRadix Puerariaeusing Response Surface Methodology. SEP SCI TECHNOL 2013. [DOI: 10.1080/01496395.2012.752749] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Parthasarathi S, Ezhilarasi P, Jena B, Anandharamakrishnan C. A comparative study on conventional and microwave-assisted extraction for microencapsulation of Garcinia fruit extract. FOOD AND BIOPRODUCTS PROCESSING 2013. [DOI: 10.1016/j.fbp.2012.10.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Zhou X, Chan SW, Tseng HL, Deng Y, Hoi PM, Choi PS, Or PMY, Yang JM, Lam FFY, Lee SMY, Leung GPH, Kong SK, Ho HP, Kwan YW, Yeung JHK. Danshensu is the major marker for the antioxidant and vasorelaxation effects of Danshen (Salvia miltiorrhiza) water-extracts produced by different heat water-extractions. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2012; 19:1263-9. [PMID: 23026310 DOI: 10.1016/j.phymed.2012.08.011] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2012] [Revised: 06/25/2012] [Accepted: 08/23/2012] [Indexed: 05/15/2023]
Abstract
Some of the major components of Danshen (Salvia miltiorrhiza), a widely used Chinese herbal medicine rich in phenolic acids, are thermosensitive and may degrade to other phenolic acids during extractions with heating. The chemical profiles of Danshen water-extract may vary with different heat water extraction at different temperatures, affecting the composition and bioactivity of the extracts. In this study, six water-extracts of Danshen obtained from heat reflux water extraction and microwave-assisted extraction with water (MAE-W) at different temperatures were tested for their composition and pharmacological effects. Among these extracts, the third-round MAE-W (100°C) extract had the highest phenolic acids and tanshinones contents, with the strongest antioxidant activity in 2,2-diphenyl-1-(2,4,6-trinitrophenyl) hydrazyl (DPPH) assay and ferric reducing/antioxidant potential (FRAP) assay. This extract also showed the strongest inhibitory effects on 2,2'-azobis-2-amidinopropane (AAPH)-induced hemolysis in human red blood cells, hydrogen peroxide-induced apoptosis in rat heart H9c2 cells and the highest relaxation effects on rat basilar artery. The antioxidant effects of Danshen water-extracts linearly correlated to their relaxation effects (r=0.895-0.977). Through multiple linear regression analysis, danshensu was found to be the most significant marker in the antioxidant and vasodilation effects of Danshen water-extract, while tanshinone IIA as the marker on hydrogen peroxide-induced apoptosis in rat heart H9c2 cells. Danshensu is, therefore, a useful marker for the quality control of Danshen water-extracts in antioxidant and vasodilation, while tanshinone IIA for anti-apoptotic potential of different extracts.
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Affiliation(s)
- Xuelin Zhou
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, China
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12
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Chen X, Kotani A, Hakamata H, Wang J, Du S, Kusu F. Three-channel column-switching high-performance liquid chromatography with electrochemical detection for determining bioactive redox components in Salvia miltiorrhiza. J Chromatogr A 2012; 1256:105-13. [DOI: 10.1016/j.chroma.2012.07.061] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2012] [Revised: 07/14/2012] [Accepted: 07/19/2012] [Indexed: 12/22/2022]
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13
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Fang X, Wang J, Zhang S, Zhao Q, Zheng Z, Song Z. Simultaneous extraction of hydrosoluble phenolic acids and liposoluble tanshinones from Salviae miltiorrhizae radix by an optimized microwave-assisted extraction method. Sep Purif Technol 2012. [DOI: 10.1016/j.seppur.2011.10.039] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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14
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Li Z, Huang D, Tang Z, Deng C. Microwave-assisted extraction followed by CE for determination of catechin and epicatechin in green tea. J Sep Sci 2010; 33:1079-84. [PMID: 20175087 DOI: 10.1002/jssc.200900647] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In this work, for the first time, microwave-assisted extraction (MAE) followed by CE was developed for the fast analysis of catechin and epicatechin in green tea. In the proposed method, catechin and epicatechin in green tea samples were rapidly extracted by MAE technique, and then analyzed by CE. The MAE conditions and the method's validation were studied. It is found that the extraction time of 1 min with 400 W microwave irradiation is enough to completely extract catechin and epicatechin in green tea sample, whereas the conventional ultrasonic extraction (USE) technique needs long extraction time of 60 min. The method validations were also studied in this work. The calibration curve shows good linearity in 0.01-3 mg/mL for catechin (R(2)=0.993), and 0.005-3 mg/mL for epicatechin (R(2)=0.996), respectively. The RSD values for catechin and epicatechin are 0.65 and 2.58%, respectively. This shows that the proposed method has good reproducibility. The proposed method has good recoveries, which are 118% for catechin and 120% for epicatechin. The proposed method was successfully applied to determination of the catechin and epicatechin in different green tea samples. The experiment results have demonstrated that the MAE following CE is a simple, fast and reliable method for the determination of catechin and epicatechin in green tea.
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Affiliation(s)
- Zhongbo Li
- Department of Chemistry, Fudan University, Shanghai, PR China
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15
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Fang X, Wang J, Yu X, Zhang G, Zhao J. Optimization of microwave-assisted extraction followed by RP-HPLC for the simultaneous determination of oleanolic acid and ursolic acid in the fruits of Chaenomeles sinensis. J Sep Sci 2010; 33:1147-55. [PMID: 20183824 DOI: 10.1002/jssc.200900726] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
An optimized microwave-assisted extraction (MAE) method and an efficient HPLC analysis method were developed for fast extraction and simultaneous determination of oleanolic acid and ursolic acid in the fruit of Chaenomeles sinensis. The open vessel MAE process was optimized by using a central composite experimental design. The optimal conditions identified were microwave power 600 W, temperature 52 degrees C, solvent to material ratio 32 mL/g and extraction time 7 min. The results showed that MAE is a more rapid extraction method with higher yield and lower solvent consumption. The HPLC-photodiode array detection analysis method was validated to have good linearity, precision, reproduction and accuracy. Compared with conventional extraction and analysis methods, MAE-HPLC-photodiode array detection is a faster, convenient and appropriate method for determination of oleanolic acid and ursolic acid in the fruits of C. sinensis.
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Affiliation(s)
- Xinsheng Fang
- College of Agronomy, Shandong Agricultural University, Taian, Shandong, PR China
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16
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Yu Y, Chen B, Chen Y, Xie M, Duan H, Li Y, Duan G. Nitrogen-protected microwave-assisted extraction of ascorbic acid from fruit and vegetables. J Sep Sci 2009; 32:4227-33. [DOI: 10.1002/jssc.200900487] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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