Influence of Different Extraction Methods of Tea Polyphenols on Proportions of Catechins

2011 ◽  
Vol 311-313 ◽  
pp. 2114-2120 ◽  
Author(s):  
Rong Hui Lai ◽  
Xing Fei Lai ◽  
Wen Xia Zhao ◽  
Ya Hui Huang
Keyword(s):  
Solvent Extraction ◽  
Organic Solvent ◽  
Extraction Method ◽  
Total Content ◽  
Extraction Methods ◽  
Tea Polyphenols ◽  
Precipitation Method ◽  
Effect Of Solvent ◽  
Organic Solvent Extraction ◽  
Solvent Extraction Method

The catechins composition of tea polyphenols with different extracted methods was analysed by HPLC. The aim is to compare the extraction effect of water-extracting and alcohol-extracting method, the purification effect of solvent extraction and ionic precipitation method. The results indicated that organic solvent extraction method can improve the extraction rate of catechins, especially can increase the content of estered catechins. In the technic of organic solvent extraction, the total content of catechins can effectively be increased by using alcohol extraction. Ion precipitation can enhance the content of gallocatechins，while organic solvent extraction can raise the contents of catechins，EC and estered catechins.

scholarly journals Rapid and simple purification of elastin-like polypeptides directly from whole cells and cell lysates by organic solvent extraction

2018 ◽  
Vol 6 (4) ◽  
pp. 863-876 ◽  
Author(s):  
Ross VerHeul ◽  
Craig Sweet ◽  
David H. Thompson
Keyword(s):  
Solvent Extraction ◽  
Nucleic Acids ◽  
Organic Solvent ◽  
Extraction Method ◽  
Whole Cells ◽  
Cell Lysates ◽  
Organic Solvent Extraction ◽  
Solvent Extraction Method

Elastin-like peptide (ELP) constructs are typically hydrophobic in nature. A rapid organic solvent extraction method is reported that affords highly pure ELP with removal of key contaminants such as nucleic acids and LPS.

Extraction of 2-Acetyl-1-Pyrroline (2AP) in Pandan Leaves (Pandanus Amaryllifolius Roxb.) Via Solvent Extraction Method: Effect of Solvent

2014 ◽  
Vol 67 (2) ◽  
Author(s):  
Norzita Ngadi ◽  
Noor Yahida Yahya
Keyword(s):  
Solvent Extraction ◽  
Extraction Method ◽  
Extraction Process ◽  
Natural Sources ◽  
Effect Of Solvent ◽  
Method Effect ◽  
Solvent Extraction Method ◽  
Pandanus Amaryllifolius

Pandan (Pandanus amaryllifolius Roxb.) leaves are widely used in Malaysia as a source of natural flavoring.  The major compound contributing to the characteristic flavour of Pandan is 2-acetyl-1-pyrroline (2AP). As the consumer requirement for use of natural flavours, extraction of components from natural sources has been sought. In this study, solvent extraction of 2AP from Pandan leaves was performed. The effect of solvent used during extraction process (i.e. methanol, ethanol, propanol) towards the yield of 2AP was investigated. The presence of 2AP was determined using GCMS. The results obtained showed that ethanol was the best solvent to extract 2AP from Pandan leaves compared to methanol as higher 2AP peak arises from ethanol chromatogram.  However there is no 2AP detected when propanol was used as solvent.  It is believed that polarity of the solvent plays an important role in the extraction of 2AP.

scholarly journals Extraction and Formulation of Perfume from Cymbopogon citratus (Lemongrass)

2021 ◽  
Vol 25 (8) ◽  
pp. 1461-1463
Author(s):  
O.E. Ameh ◽  
J.I. Achika ◽  
N.M. Bello ◽  
A.J. Owolaja
Keyword(s):  
Solvent Extraction ◽  
Essential Oil ◽  
Essential Oils ◽  
Boiling Point ◽  
Extraction Method ◽  
Extraction Methods ◽  
Suitable Method ◽  
Oil Yield ◽  
Cymbopogon Citratus ◽  
Solvent Extraction Method

This work aimed to extract perfume from the leaves of Cymbopogon citratus using three extraction methods viz: distillation, solvent extraction and expression or effleurage. About 150 g of dried lemons grass were extracted using ethanol as the solvent to obtain essential oils required for the formulation of perfumes. The result of the hydrodistillation process showed that 1.23 g of essential oil per 130g of dry lemongrass produce 0.95% oil at 78 °C, while the effleurage method was 2.55 g of essential oil per 130 g of dry lemongrass sample thereby producing 1.96% oil yield. The solvent extraction method gave 2.7 g of essential oil per 130 g of dry lemongrass sample. This gives about 2.08 % yield of essential oil at a temperature of 78°C i.e. the boiling point of ethanol. The solvent extraction method yielded 2.08%, the effleuragemethod yielded 1.96% and the hydrodistillation method yielded 0.95% essential oil respectively. In conclusion, solvent extraction gave the highest yield because of less exposure to air and heat, which is highly recommended as the most suitable method for the extraction of essential oil.

Rapid Solvent Extraction Methods for Fission Product Separation and Analysis

1963 ◽  
Vol 2 (2) ◽  
Author(s):  
T. V. Healy
Keyword(s):  
Solvent Extraction ◽  
Fission Product ◽  
Extraction Method ◽  
Fission Products ◽  
Extraction Methods ◽  
Acid Solutions ◽  
Solvent Extraction Method ◽  
Product Separation ◽  
Irradiated Fuel ◽  
Product Solution

SummaryA new, quick and efficient solvent extraction method of separating various constituents from irradiated fuel samples has been evolved. In this method, the following groups are isolated, using diethyl hexyl phosphoric acid, (HDEHP) as solvent (1) Ru, Cs, Sr, Ba. (2) Ce. (3) Y plus rare earths. (4) Zr and Nb. Further solvent extraction methods are used for separation of individual elements.A rapid method is described for the extraction and estimation of zirconium-95 from fission product solution utilizing HDEHP. The fission products are normally in nitric or hydrochloric acid solution but extractions from sulphuric acid solutions are also described. The method usually takes half an hour and an accuracy of ± 1% is obtained.

scholarly journals PERBANDINGAN METODE RENDERING BASAH DAN EKSTRAKSI PELARUT N-HEKSANA TERHADAP KARAKTERISTIK KIMIA MINYAK IKAN SELAR (Selaroides leptolepis)

2020 ◽  
Vol 5 (1) ◽  
pp. 21-25
Author(s):  
Nurfadilah
Keyword(s):  
Solvent Extraction ◽  
Fish Oil ◽  
Extraction Method ◽  
Unsaturated Fatty Acids ◽  
Human Growth ◽  
Extraction Process ◽  
Extraction Methods ◽  
Acid Number ◽  
Solvent Extraction Method ◽  
Long Chain

Fish oil contains nutrients that are good for human growth because generally it contains long-chain unsaturated fatty acids that have double bonds, namely eicosapenta-enoate (EPA), and docose-hexaenoate (DHA). Fish Oil is obtained from the extraction process, namely the process of separating fish oil from the meat. This study aims to determine the comparison of wet rendering methods and n-hexane solvent extraction on the chemical characteristics of selar fish oil (selaroides leptolepis). The method used in this research is descriptive experimental method by comparing the 2 extraction methods that are treated in this study. The extraction method used was the Wet Rendring Extraction Method and N-Hexane Solvent. The extracted fish oil was then characterized by the acid number, saponation number and peroxide number. The saponification number using the wet rendering extraction method (20.63 mg KOH / g) is relatively the same as the solvent extraction method (20.53). The peroxide value in the wet rendering extraction method (29.59 mek / kg) was higher than the n-hexane solvent extraction method (24.77 mek / kg). The acid number in the wet rendering extraction method (70.2 mg KOH / gr) was higher than the solvent extraction method (23.74 mg KOH / gr). Selar fish oil extracted using wet rendering method and n-hexane solvent has low quality

scholarly journals Effects of different extraction methods on antioxidant properties of blueberry anthocyanins

2021 ◽  
Vol 19 (1) ◽  
pp. 138-148
Author(s):  
Xiang Li ◽  
Feiying Zhu ◽  
Zhiwen Zeng
Keyword(s):  
Solvent Extraction ◽  
Enzymatic Hydrolysis ◽  
Extraction Method ◽  
Antioxidant Properties ◽  
Extraction Methods ◽  
Ultrasonic Extraction ◽  
Inhibition Rate ◽  
Extraction Technology ◽  
Solvent Extraction Method ◽  
Measurement Results

Abstract Currently, the extraction technology of blueberry anthocyanin includes solvent extraction, enzyme extraction, and ultrasonic extraction. Different methods may damage the internal structure of anthocyanin in the extraction process, and hence the extracted anthocyanin cannot have the maximum nutritional and medicinal value. Therefore, this article analyzes the effects of different extraction methods on the antioxidant properties of blueberry anthocyanin and uses solvent extraction, enzymatic hydrolysis, and ultrasonic extraction methods to extract blueberry anthocyanin. The antioxidative properties of anthocyanins from blueberry by different extraction methods were compared and analyzed. The solvent extraction method, the enzymatic hydrolysis method, and the ultrasonic extraction method were used as experimental comparative extraction methods. The antioxidant properties of blueberry anthocyanins were measured from various angles such as resistance to oil oxidation, reducing power, and ability to scavenge hydroxyl radicals (˙OH) performance. From the perspective of antioxidation of fats and oils, the average inhibition rate of the solvent extraction method can reach 90%, and the corresponding inhibition rate of the anthocyanins obtained by the other two extraction methods is about 80%. The measurement results are also consistent with the measurement results of oxidation resistance of oils and fats. Conclusion: Among three different extraction methods of blueberry anthocyanins, the solvent extraction method can preserve the antioxidant properties of blueberry anthocyanins to the greatest extent.

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