Microwave-assisted extraction versus Soxhlet extraction to determine triterpene acids in olive skins

Fernández-Pastor, Ignacio; Fernández‐Hernández, A.; Perez-Criado, Sergio; Rivas, Francisco; Martı́nez, Antonio; Garcı́a-Granados, Andrés; Parra, Andrés

doi:10.1002/jssc.201601130

Cited by 41 publications

(25 citation statements)

References 51 publications

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“…This can explain the high efficency of MAE. A similar result was reported in the study on extraction of triterpene acids from olive skins [ 50 ], and phenolic compounds from blueberry leaves [ 51 ]. Additionally, the extract obtained by MAE method showed higher total phenolic content (TPC) and total flavonoid content (TFC) than the other two extraction methods, which further demonstrated the high efficiency of MAE.…”

Section: Resultssupporting

confidence: 87%

Microwave-Assisted Extraction of Natural Antioxidants from the Exotic Gordonia axillaris Fruit: Optimization and Identification of Phenolic Compounds

Lin³

et al. 2017

Molecules

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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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Section: Resultssupporting

confidence: 87%

Microwave-Assisted Extraction of Natural Antioxidants from the Exotic Gordonia axillaris Fruit: Optimization and Identification of Phenolic Compounds

Lin³

et al. 2017

Molecules

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“…A method based on a pre‐column derivatization using cridone‐9‐ethyl‐p‐toluenesulfonate for accurate determination of MA and OA in fruits was developed . In addition, a microwave‐assisted extraction method also has been developed to extract MA and OA from olive skins and this method has gained advantages over conventional Soxhlet extraction way in the time, cost, and efficiency . Meanwhile, a series of patents for the preparation of MA and OA was authorized by the US Patent office .…”

Section: Introductionmentioning

confidence: 99%

Continuous separation of maslinic and oleanolic acids from olive pulp by high‐speed countercurrent chromatography with elution‐extrusion mode

Huang

Zhang

Pei

et al. 2019

J of Separation Science

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In this work, a continuous high-speed countercurrent chromatography method has been developed on the basis of elution-extrusion mode and this method was successfully applied to the separation of maslinic and oleanolic acid from the extract of olive pulp. In the process of 'elution', the sample solution was continuously loaded into the column and the maslinic acid was steadily eluted out in this step while highly retained oleanlic acid always stayed in the column. In the process of 'extrusion', the oleanlic acid was pushed out of the column with the stationary phase. In this way, we achieved a large sample loading. A total of 120 mL sample solution (about 89.55% of the column volume) which contains 600 mg olive pulp extract was pumped in the apparatus by a constant-flow pump and the maslinic and oleanolic acids were largely separated within 120 min. Both of these two compounds presented high yields and high purities (271.6 mg for maslinic acid with 86.7% and 83.9 mg oleanolic acids with 83.4%).

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“…SPME is an effective sample preparation technique , and it integrates sampling, extraction, enrichment and sample introduction into one process . Before the appearance of SPME, some traditional methods have been applied , such as liquid‐liquid microextraction , Soxhlet extraction , SPME and so on. Compared with these methods, SPME has higher sensitivity, less time and solvent consumption.…”

Section: Introductionmentioning

confidence: 99%

Diamond nanoparticles coating for in‐tube solid‐phase microextraction to detect polycyclic aromatic hydrocarbons

Feng

Wang

et al. 2018

J of Separation Science

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Diamond nanoparticles were coated onto stainless steel wires as a extraction material, then it was filled into a poly(ether ether ketone) tube for in‐tube solid‐phase microextraction. Coupled with high‐performance liquid chromatography, the extraction tube was evaluated with different types of analytes including polycyclic aromatic hydrocarbons, estrogens and plasticizers. As the coating, diamond nanoparticles exhibited greater extraction capacity for hydrophobic analytes. Several polycyclic aromatic hydrocarbons were used as model analytes, four main extraction and desorption factors were optimized, including sampling volume, sampling rate, methanol content in sample and desorption time. A sensitive analysis method was established with wide linear range (0.016–20 μg/L), good correlation coefficients (0.9991–0.9997), low limits of detection (0.005–0.020 μg/L), low limits of quantitation (0.016–0.070 μg/L) and high enrichment factors (305‐2396). Relative standard deviations for intra‐ and interday were less than 2.4% (n = 3) and 8.4% (n = 3), respectively. Durability and chemical stability were satisfactory with relative standard deviations less than 7.9% (n = 3). Finally, the method has been successfully applied to the detection of polycyclic aromatic hydrocarbons in real samples.

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Microwave-assisted extraction versus Soxhlet extraction to determine triterpene acids in olive skins

Cited by 41 publications

References 51 publications

Microwave-Assisted Extraction of Natural Antioxidants from the Exotic Gordonia axillaris Fruit: Optimization and Identification of Phenolic Compounds

Microwave-Assisted Extraction of Natural Antioxidants from the Exotic Gordonia axillaris Fruit: Optimization and Identification of Phenolic Compounds

Continuous separation of maslinic and oleanolic acids from olive pulp by high‐speed countercurrent chromatography with elution‐extrusion mode

Diamond nanoparticles coating for in‐tube solid‐phase microextraction to detect polycyclic aromatic hydrocarbons

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