How does extraction method affect phenols,flavanoid content?
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Extraction methods significantly impact the phenolic and flavonoid content of plant extracts. Various techniques like solvent extraction, ultrasound-assisted extraction, and sonication-assisted extraction influence the yield and composition of these bioactive compounds . For instance, the choice of solvent and extraction conditions plays a crucial role in enhancing the extraction efficiency of phenolic compounds . Additionally, the concentration of ethanol used during extraction can affect the levels of anthocyanins, phenolics, and flavonoids in the final extract . Moreover, the optimization of extraction parameters such as time, temperature, and solvent mixture can lead to the maximization of phenolic compounds, flavonoid content, and antioxidant capacity in the extracted material . Therefore, the selection and optimization of extraction methods are vital in determining the phenolic and flavonoid content of plant extracts.
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| Papers (5) | Insight |
|---|---|
| The extraction method influences phenolic compounds and flavonoid content, with optimal conditions being 93 minutes at 94°C in a 66% ethanol/water solvent mixture. | |
| Extraction methods like methanol and water:methanol influence phenolic and flavonoid content positively, yielding higher amounts in Bauhinia variegata and Leptadenia reticulata extracts. | |
| Extraction method impacts phenolic content, with higher ethanol concentrations enhancing anthocyanins but not phenolics and flavonoids in Kaempferia parviflora rhizome extracts. | |
| Extraction methods impact phenol content by breaking bonds in plant tissue, affecting yield. Different methods vary in effectiveness based on plant species and pH, influencing flavonoid extraction. | |
85 Citations | Extraction methods like MAE, PLE, SFE, and UAE influence phenolic content. MAE yields the highest total phenolic content, followed by PLE, UAE, and SFE, impacting flavonoid levels. |
Related Questions
How much phenolic compound get after peppermint extraction?5 answersAfter extracting bioactive compounds from peppermint using various methods, the total phenolic content varied significantly. Microwave extraction resulted in a total phenol content ranging from 25.000 to 391.687 mg GAE/100 g dw. Distillation by-products of peppermint, specifically hydrosol, contained valuable phenolics, with eriocitrin reaching 917.5 mg/L after 1 h distillation. Microwave-assisted extraction of polyphenolic compounds from organic peppermint leaves yielded varying amounts depending on the microwave irradiation power, with the highest experimentally determined value of 2.28 min−1 at 600 W. Ultrasonic extraction from water mint under different drying methods and temperatures resulted in a maximum total phenolic compounds of 0.2451 mg/g using freeze-drying at 60 °C. Pressurized hot water extraction of phenolics from peppermint yielded higher total phenolic contents at 160 °C compared to 130 °C.
How time impacts the extraction process of cyanidin?4 answersTime plays a crucial role in the extraction process of cyanidin. Studies have shown that extraction time significantly affects the yield of cyanidin. For instance, in the extraction of procyanidins from buckwheat shells, the extraction time was found to have a significant impact on the yield of procyanidins. Optimal extraction conditions for procyanidins included a specific extraction time, which when followed, resulted in a high actual yield close to the predicted value. Similarly, in the extraction of cyanidin from purple lettuce, the extraction time was identified as one of the key factors influencing the extraction efficiency. Therefore, controlling and optimizing the extraction time is essential to enhance the efficiency and yield of cyanidin extraction processes.
How do different extraction methods affect the yield and composition of bioactive compounds in plant extracts?5 answersDifferent extraction methods significantly impact the yield and composition of bioactive compounds in plant extracts. Various techniques such as maceration, Soxhlet extraction, ultrasound-assisted extraction, and microwave-assisted extraction have been studied for their effects on phytochemical profiles and biological activities. For instance, ultrasound-assisted extraction has shown high yields of bioactive compounds and strong antioxidant activity in green coffee bean extracts. Similarly, microwave-assisted water extraction has been found to be effective in isolating volatile compounds from Veronica taxa, with hydrosol extracts proving to be valuable sources of compounds for potential applications. The choice of solvent in ultrasound-assisted extraction has been crucial, with ethanol identified as the best solvent for recovering bioactive compounds from ora-pro-nobis leaves. Overall, the selection of extraction method and parameters plays a vital role in determining the quantity and quality of bioactive compounds obtained from plant materials.
What is the correlation between total flavanoid content and phenolic content in different plant species?5 answersThe correlation between total flavonoid content and phenolic content in different plant species has been investigated in several studies. In one study, it was found that there is a good correlation between antioxidant activity and total phenolic content as well as total flavonoid content in neem flower extracts. Another study also established a significant correlation between antioxidant capacities and total phenol/flavonoid content in methanolic extracts of medicinal plants. Similarly, a strong correlation was found between phenolic content, antioxidant activity, and enzyme inhibitory activity in commonly used medicinal herbs. Additionally, a study on jati putih leaves fraction showed a correlation between total phenolic and flavonoid content and antioxidant activity. These findings suggest that phenolic compounds, including flavonoids, play a major role in the antioxidant activity of plants.
Amount of flavonoids present in the extraction?5 answersThe amount of flavonoids present in the extraction varied across the different studies. Chionanthus retusa leaf extraction yielded a flavonoid content of 121.28 mg/g. Okra flowers had a flavonoid content of 3.42%. The roots of Helicteres hirsuta had a total flavonoid value of 3.52684 mg Catechin/g extract. Flavonoids were isolated from Holothuria leucospilota sea cucumber, with a dry fraction containing 37.47 mg of flavonoids. Finger citron extraction resulted in a total flavonoid yield of 33.12 mg/g.
What plants are rich in flavanoids and phenolic acid?3 answersPlants that are rich in flavonoids and phenolic acids include Lycium schweinfurthii, Clinopodium vulgare, Ehretia thyrsiflora, and species of the genus Agave. Additionally, Citrullus colocynthis, Cucumis sativus, and Momordica charantia herbs have been found to contain phenolic compounds, including flavonoids and phenolic acids.