Modelling Extraction of White Tea Polyphenols: The Influence of Temperature and Ethanol Concentration

Peiró, Sara; Gordon, Michael H.; Blanco, Mónica; Pérez‐Llamas, Francisca; Segovia, Francisco; Pablos, María Pilar Almajano

doi:10.3390/antiox3040684

Cited by 14 publications

(11 citation statements)

References 38 publications

(66 reference statements)

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“…The yield value of 10.5 % is obtained by extraction conditions similar to the difference in concentration of 15 %. Extraction results (especially yields) obtained are better than existing studies [10,13,14].…”

Section: Fig 1: Model Analysis Results For Response Yields (Y1contrasting

confidence: 53%

“…In the extraction mechanism, there is a minimum time needed for the solvent to penetrate the cell and expand. This condition will make the solvent more effective in dissolving the target compounds contained in cells [14,19]. This KAI technique regulates a fixed temperature at 90 °C referring to the basic technique.…”

Section: Resultsmentioning

confidence: 99%

“…The optimization procedure using the DoE approach refers to studies that have been conducted [13,14,24,25]. Optimization of the extraction process with the DoE approach using the Design-Expert software.…”

Section: Resultsmentioning

confidence: 99%

“…Quantitative data from experiments are modeled, evaluated, and analyzed using response surface methodology (RSM). This analysis with mathematical and statistical techniques is appropriate for problems solving in responses that are influenced by several variables [14]. The main factors as independent variables studied for the development of extraction methods are concentration (water to a material ratio) (%, A), stirring rate (rpm, B), and extraction time (min, C).…”

Section: Optimization Designmentioning

confidence: 99%

“…Several studies related to the optimization of the extraction process of white tea have been done. However, the report is limited to brewing and infusion techniques with variable temperature, extraction time and ethanol concentration [13,14]. Optimization of phenolic extraction from green tea using UAE method [12].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Optimization of a Novel Kinetic-Assisted Infundation for Rich-Egcg and Polyphenols of White Tea (Camellia Sinensis) Using Central Composite Design

Shiyan¹,

Hertiani²,

Martien³

et al. 2018

Int J App Pharm

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Objective: This research aimed to find modeling and optimization of a novel kinetic-assisted infundation for rich-epigallocatechin gallate (EGCG) and polyphenols extraction from white tea leaf (Camellia sinensis L.).Methods: The optimal conditions for the best extraction of kinetic-assisted infundation were determined using central composite design. The content of EGCG, catechin, gallic acid, caffeine, theobromine, and theophylline was quantified using high-performance liquid chromatography with ultraviolet detection (HPLC/UV-detection). The total polyphenolic content (TPC) and total flavonoid content (TFC) was measured using the spectrophotometric method. The semi-purified extract was characterized by HPLC, fourier transform infrared spectrophotometry-universal attenuated total reflectance (FTIR-UATR), and powder-X ray diffraction (P-XRD). The extraction mechanism of target compounds was analyzed using scanning electron microscopy (SEM) qualitatively.Results: The optimum process for the rich-EGCG and polyphenolic extraction using kinetic-assisted infundation was the concentration of simplicia 14.75 %, the stir rate 440 rpm, and extraction time 12.31 min. The yield of extracts, TPC, TFC, EGCG, caffeine, gallic acid, and theobromine contents in the optimal extraction process were 9.34 %, 70.97 %, 13.95 %, 29.02 %, 11.95 %, 1.33 %, and 0.33 %, respectively.Conclusion: The kinetic-assisted infundation method proved to be easy to apply with good results as an alternative technique for extracting polyphenolic compounds and rich-EGCG from white tea leaves.

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Section: Fig 1: Model Analysis Results For Response Yields (Y1contrasting

confidence: 53%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Optimization Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Optimization of a Novel Kinetic-Assisted Infundation for Rich-Egcg and Polyphenols of White Tea (Camellia Sinensis) Using Central Composite Design

Shiyan¹,

Hertiani²,

Martien³

et al. 2018

Int J App Pharm

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Extraction optimization for the antioxidants from Nigella sativa seeds using response surface methodology

Muzolf-Panek

Gliszczyńska‐Świgło

2022

Food Measure

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Although many studies have explored the bioactive compound content of Nigella sativa (black seed – BS) essential oil, data on the phenolic compound content in the extracts of Nigella sativa seeds gives inconclusive results [1–3]. In this study, response surface methodology (RSM) with a central composite plan (CCP) was used for the experimental design and identification of the optimal conditions for maximizing the phenolic content and the antioxidant activity of BS extract. The independent variables were as followed: temperature (22.9–67.1ºC), time (31.7–208.2 min), and methanol concentration in water (5.9–94.1% v/v). Different response variables (total polyphenols – TPC, total flavonoids – TFC and the antioxidant activity – DPPH and TEAC) required different optimal conditions to maximize them. The multi-response optimization was performed to determine the extraction conditions, which would simultaneously ensure the highest phenolic content and the antioxidant activity. The optimal conditions derived from the multi-response desirability function were as followed: 120 min, 56 °C and 50% methanol, giving the TPC = 7.05 mg/g, TFC = 3.05 mg/g, DPPH = 9.04 µmol/g and TEAC = 33.24 µmol/g (with desirability function coefficient = 0.83). Solvent concentration was established as a crucial parameter for the extraction of antioxidants from BS. A quercetin derivative and two derivatives of kaempferol were determined by HPLC (high performance liquid chromatography) analysis of the BS extract at the optimal conditions. The accuracy of the models for all response variables was confirmed by a high correlation coefficient (r = 0.99) between the experimental values and those predicted under optimal conditions.

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Extraction and Characterization of Phenolic Compounds from Bamboo Shoot Shell Under Optimized Ultrasonic-Assisted Conditions: a Potential Source of Nutraceutical Compounds

Jiang

Belwal

Huang

et al. 2019

Food Bioprocess Technol

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Modelling Extraction of White Tea Polyphenols: The Influence of Temperature and Ethanol Concentration

Cited by 14 publications

References 38 publications

Optimization of a Novel Kinetic-Assisted Infundation for Rich-Egcg and Polyphenols of White Tea (Camellia Sinensis) Using Central Composite Design

Optimization of a Novel Kinetic-Assisted Infundation for Rich-Egcg and Polyphenols of White Tea (Camellia Sinensis) Using Central Composite Design

Extraction optimization for the antioxidants from Nigella sativa seeds using response surface methodology

Extraction and Characterization of Phenolic Compounds from Bamboo Shoot Shell Under Optimized Ultrasonic-Assisted Conditions: a Potential Source of Nutraceutical Compounds

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