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Готові списки джерел за темами / Extraction and chromatography / Статті в журналах

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Статті в журналах з теми "Extraction and chromatography"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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1

Kostanyan, Artak E., Vera V. Belova, Yulia V. Tsareva, and Maria M. Petyaeva. "Separation of Rare Earth Elements in Multistage Extraction Columns in Chromatography Mode: Experimental Study and Mathematical Simulation." Processes 11, no. 6 (2023): 1757. http://dx.doi.org/10.3390/pr11061757.

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The application of liquid–liquid chromatography principles to solvent extraction processes in hydrometallurgy can greatly simplify rare earth metal separation technologies by separating multicomponent mixtures in one technological operation. In this study, the chromatographic separation of rare earth elements (REEs) in multistage extraction columns was experimentally studied under conditions of impulse sample injection—single and multiple loading of large volumes of metal salt solution into the installation. The results obtained showed the feasibility of operating sieve plate extraction column

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2

Fagan, Sylvia V. B., Connie Gombatz, Hafez Abdel-Kader, and Govind Menon. "Determination of Ardacin in Various Silage Feed Diets by a Rapid Liquid Chromatographic Assay." Journal of AOAC INTERNATIONAL 78, no. 1 (1995): 16–21. http://dx.doi.org/10.1093/jaoac/78.1.16.

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Abstract A method is presented for the detection and quantitation of Ardacin in silage feed diets by liquid chromatography, using a cyano column and an acetonitrile–methanol water mobile phase modified with trifluoroacetic acid. This method includes comprehensive procedures for extracting Ardacin from various silage feed formulations, cleaning up the extracted sample by using solid-phase extractions, and analyzing the eluted solid-phase extract with a suitable liquid chromatographic system. Ardacin was extracted from the silage feed formulations with 50% acetonitrile and 50% 0.1 M KOH. The ext

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3

Jamunkar, Reena, Deepak Sinha, Tarun Kumar Patle, and Kamlesh Shrivas. "A Review on Extraction, Identification and Application of Pesticidal Active Phytoderived Metabolites." Journal of Ravishankar University (PART-B) 37, no. 1 (2024): 152–87. http://dx.doi.org/10.52228/jrub.2024-37-1-10.

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Bioactive compounds obtained from plants, microorganisms and minerals show some specific properties like insecticidal, herbicidal, repellent, antifeedant and toxicant activities called bio pesticide. They have specific modes of action against different pests. Due to their environmental eco-friendly nature, low cost, economic effectiveness, less pollution, and target specific quality they are in high demand in agriculture compared to chemical or synthetic pesticides. Extraction, purification, identification and characterization of these compounds from the plants materials are found always chall

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4

Ferreira, Inês M., and Luis F. Guido. "Advances in Extraction Techniques for Beer Flavor Compounds." Beverages 9, no. 3 (2023): 71. http://dx.doi.org/10.3390/beverages9030071.

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Owing to the unique chemical properties exhibited by beer flavor compounds, different extraction methods have been utilized to extract these compounds from the sample matrix. Carbonyl compounds, which significantly contribute to flavor instability in beer, pose challenges in detection due to their low concentrations and reactivity. Consequently, the analysis of beer flavor compounds has focused on improving sensitivity and specificity through techniques that minimize sample preparation requirements and reduce interactions between factors involved in the analysis. Notably, extraction techniques

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5

Kiselyova, K. E., N. Yu Bevz, O. O. Mykhailenko, M. V. Yaromiy, and L. I. Vyshnevska. "The substantiation of the choice of an extractant for obtaining extractions of the overground part of Lespedeza bicolor." News of Pharmacy 107, no. 1 (2024): 58–65. http://dx.doi.org/10.24959/nphj.24.126.

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Aim. To substantiate the choice of an extractant when obtaining extractions of the overground part of Lespedeza bicolor. Materials and methods. The study object was the crushed overground part of Lespedeza bicolor. Extraction was carried out with purified water, 40 % and 70 % water-alcohol solution by the method of fine maceration and using a device for ultrasound extraction. Analytical studies were performed by the appropriate identification reactions, by the method of thin-layer chromatography on Silica gel 60 chromatographic plates of the Merk company; spectrophotometric tests were carried

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6

Monroy-Guzman, Fabiola, Celia del Carmen De la Cruz Barba, Edgar Jaime Salinas, Vicente Garibay-Feblés, and Tobias Noel Nava Entzana. "Extraction Chromatography Materials Prepared with HDEHP on Different Inorganic Supports for the Separation of Gadolinium and Terbium." Metals 10, no. 10 (2020): 1390. http://dx.doi.org/10.3390/met10101390.

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Bis(2-ethylhexyl)phosphoric acid (HDEHP) is frequently used as an extractant in the separation and recovery of lanthanides by solvent extraction and extraction chromatography, where HDEHP (stationary phase) is fixed on an inert support and the mobile phase is an aqueous solution. Because the results of extraction chromatography strongly depend on the support material, in this study, we aim to prepare solid extractants (extraction chromatography materials) with different inorganic supports impregnated with HDEHP for the adsorption of Gd and Tb from HCl solutions, putting emphasis on the effect

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7

Mali, S. D., and A. P. Jadhav. "EXTRACTION AND ISOLATION OF EMBELIN USING FLASH CHROMATOGRAPHY." INDIAN DRUGS 53, no. 06 (2016): 80–81. http://dx.doi.org/10.53879/id.53.06.10443.

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A rapid and efficient flash chromatographic process for selective isolation of embelin from Embelia ribes was developed. The rate of extraction and purity of embelin depends upon the solvent used for extraction and optimized chromatographic separation. Ethyl acetate was found to be best solvent for highest possible recovery of the embelin from Embelia ribes. Flash chromatography speed up the purification process for quicker results. The purified sample of embelin was then characterized by UV, HPTLC, NMR and Mass.

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8

Kudzin, Zbigniew H., and Włodzimierz Kopycki. "Extraction chromatography of alkanethiols." Journal of Chromatography A 449 (January 1988): 306–11. http://dx.doi.org/10.1016/s0021-9673(00)94389-9.

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9

Abbasi, W. A., and M. Streat. "Comments on extraction chromatography." Journal of Radioanalytical and Nuclear Chemistry Letters 188, no. 2 (1994): 163–67. http://dx.doi.org/10.1007/bf02164950.

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10

Dianu, Aurelia Magdalena, and Relu Ion Dobrin. "Separation and quantification of 90Sr from ion-exchange resin radioactive waste: methods and techniques of analysis." Radiochimica Acta 108, no. 8 (2020): 627–40. http://dx.doi.org/10.1515/ract-2019-3213.

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AbstractFour methods for 90Sr separation from spent ion-exchange resin samples were carried out, offering a useful methodology to achieve interferences free 90Sr fractions. The four methods consist in resin sample decomposition, pre-treatment and selective separation of 90Sr by using: (a) a single chromatographic extraction process, (b) double chromatographic extraction, (c) a single chromatographic extraction process followed in sequence by two precipitations, and (d) ion-exchange chromatography, followed by extraction chromatography and precipitation. Mineralization by microwave acid digesti

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11

Wu, Na, Bo Zhou, He Ping Yan, Shi Juan Xu, Yun Hui Long, and Wei Liu. "Determination of Hexachlorocyclohexane (HCH) in Panax notoginseng of Chinese Traditional Medicine by Gas Chromatography/Mass Spectrometry." Advanced Materials Research 830 (October 2013): 422–25. http://dx.doi.org/10.4028/www.scientific.net/amr.830.422.

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A novel method was developed for the determination of HCH in Panax Notoginseng of Chinese traditional medicine by ultrasonic extraction (UE) coupled with Gel Permeation Chromatography and Gas Chromatography/Mass spectrometry. Some important parameters that influence the extraction and purification efficiency were investigated. The optimum condition Panax Notoginseng of Chinese traditional medicine was extracted with dichloromethane about 20mL, extracting times and extracting time were one and 30min. The extracts were cleaned up by Gel Permeation Chromatography, and determined by Gas Chromatogr

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12

Firestone, David. "Determination of Dioxins and Furans in Foods and Biological Tissues: Review and Update." Journal of AOAC INTERNATIONAL 74, no. 2 (1991): 375–84. http://dx.doi.org/10.1093/jaoac/74.2.375.

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Abstract Determination of trace residues of polychlorlnated dlbenzo- p-dloxlns and dibenzofurans (PCDDs and PCDFs) In various matrixes Is carried out by a limited number of laboratories In the United States, Canada, and other countries. Current methods for analysis of foods and biological tissues Include a combination of preparation, extraction, cleanup, isolation, determination, and Identity confirmation procedures. Soxhlet, liquid/liquid, solid-phase, and column extraction procedures are used as well as treatment with acid or base before solvent extraction. Cleanup and isolation steps Includ

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13

Lee, Hing-Biu. "Review of Analytical Methods for the Determination of Nonylphenol and Related Compounds in Environmental Samples." Water Quality Research Journal 34, no. 1 (1999): 3–36. http://dx.doi.org/10.2166/wqrj.1999.002.

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Abstract Analytical methods published in the last 20 years for the extraction, chromato-graphic separation, and quantification of alkylphenol ethoxylates (APEO) and related compounds in environmental samples are reviewed. Examples of various isolation and preconcentration techniques for water, effluent, sediment and sludge are presented. This includes procedures from the classical liquid-liquid and Soxhlet extraction to the up-to-date solid phase and supercritical fluid extraction. Chromatographic separation of APEO by normal and reversed phase liquid chromatography (LC) and capillary column g

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14

Shkurdoda, S., D. Shynkarenko, V. Pasichnyk, K. Korol, and O. Posilskyi. "EXPERT STUDY OF ISONIAZIDE IN MEAT PRODUCTS." Criminalistics and Forensics, no. 66 (2021): 785–99. http://dx.doi.org/10.33994/kndise.2020.66.57.

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The article deals with the recommendations for the detection of isoniazid in meat products, using the example of minced meat using physicochemical methods. This study does not lose its relevance over the years, due to the use of drugs for tuberculosis for poisoning homeless and domestic animals, in particular dogs, in different regions of Ukraine, the main active ingredient of which is isoniazid. The article describes a method for the extraction of isoniazid in food products of meat origin (minced meat, sausage), which presumably could or may be used to poison domestic animals, in particular d

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15

ANGELINI, E., I. BAZZO, M. SAVINO, and M. BORGO. "Ochratoxin A: Comparison of Extraction Methods from Grapes and Quantitative Determination by Different Competitive Enzyme-Linked Immunosorbent Assay Kits." Journal of Food Protection 71, no. 12 (2008): 2488–96. http://dx.doi.org/10.4315/0362-028x-71.12.2488.

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The European Community has recently established a maximum limit for ochratoxin A (OTA) concentration in grapevine products, but many practical difficulties remain concerning the establishment of optimum cost-effective methods of quantification. The performance of four extraction procedures and three commercial competitive enzyme-linked immunosorbent assays (cELISAs) for grapes were compared. Results differed for the extractions and the cELISA kits. The advantage of using immunoaffinity columns (IACs) in the extraction was the excellent detection limit, which was between 0.06 and 0.0075 ng ml−1

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16

Kirtimaya, Mishra* Dr. K. Balamurugan1 Dr. R. Suresh1. "A REVIEW: AN APPROACH TOWARDS THE ANALYTICAL METHOD DEVELOPMENT FOR DETERMINATION OF NEWER DRUGS." INDO AMERICAN JOURNAL OF PHARMACEUTICAL RESEARCH 07, no. 01 (2017): 7353–60. https://doi.org/10.5281/zenodo.1006749.

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In this present scenario for treating various diseases several new drugs were invented. Before launching to the market these drugs must undergo analytical validation process. In this review some of analytical techniques such as ultraviolet/ visible spectrophotometry, fluorimetry, capillary electrophoresis, and chromatographic methods (gas chromatography and high-performance liquid chromatography), LC-MS, GC-MS, SOLID PHASE EXTRACTION, NMR, MASS Spectrophotometry LC/MS/MS LC/UV X-ray crystallography were discussed.

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17

Frey, R. S., M. R. Hathaway, and W. R. Dayton. "Comparison of the effectiveness of various procedures for reducing or eliminating insulin-like growth factor-binding protein interference with insulin-like growth factor-I radioimmunoassays on porcine sera." Journal of Endocrinology 140, no. 2 (1994): 229–37. http://dx.doi.org/10.1677/joe.0.1400229.

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Abstract We have examined the efficacy of various methods for reducing the interference of insulin-like growth factor-binding proteins (IGFBPs) with insulin-like growth factor-I (IGF-I) radioimmunoassays (RIAs) run on porcine sera. Acid–ethanol (AE) extraction, AE extraction followed by cryoprecipitation, glycyl–glycine (GG) extraction, GG extraction followed by Sephadex G-50 chromatography in 1 mol acetic acid/l (GG/G-50), and Sep-Pak chromatography were analysed. To provide a range of IGF-I and IGFBP levels, sera obtained from control, hypophysectomized, diabetic and somatotrophin-treated pi

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18

Zou, Chun, Xin Zhang, Yongquan Xu, and Junfeng Yin. "Recent Advances Regarding Polyphenol Oxidase in Camellia sinensis: Extraction, Purification, Characterization, and Application." Foods 13, no. 4 (2024): 545. http://dx.doi.org/10.3390/foods13040545.

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Polyphenol oxidase (PPO) is an important metalloenzyme in the tea plant (Camellia sinensis). However, there has recently been a lack of comprehensive reviews on Camellia sinensis PPO. In this study, the methods for extracting PPO from Camellia sinensis, including acetone extraction, buffer extraction, and surfactant extraction, are compared in detail. The main purification methods for Camellia sinensis PPO, such as ammonium sulfate precipitation, three-phase partitioning, dialysis, ultrafiltration, ion exchange chromatography, gel filtration chromatography, and affinity chromatography, are sum

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19

Jatlow, P., and H. Nadim. "Determination of cocaine concentrations in plasma by high-performance liquid chromatography." Clinical Chemistry 36, no. 8 (1990): 1436–39. http://dx.doi.org/10.1093/clinchem/36.8.1436.

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Abstract We describe a procedure for measuring concentrations of cocaine in plasma by reversed-phase high-performance liquid chromatography, with ion-pairing. The procedure involves solvent extraction followed by back-extraction with dilute acid. The n-propyl ester of benzoylecgonine is used as an internal standard. An evaporation step is not required, and concentrations as low as 5 micrograms/L can be quantified. Plasma concentrations of cocaine determined by high-performance liquid chromatography correlated well with those determined by a previously reported gas-chromatographic procedure wit

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20

Romanyuk, Anna A., and Dmitry V. Moiseev. "Determination of the optimal conditions for the extraction of anthraglycosides of alder buckthorn bark, development and validation of a method for their quantitative determination by high performance liquid chromatography." Человек и его здоровье 25, no. 4 (2022): 118–27. http://dx.doi.org/10.21626/vestnik/2022-4/15.

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Objective: optimization of extraction conditions for anthraglycosides of alder buckthorn bark, development and validation of a method for their quantitative determination using high performance liquid chromatography. Materials and methods. The object of the study was alder buckthorn bark from different manufacturers. The work was performed on an Agilent 1100 liquid chromatograph complete with a G1311A four-solvent supply and degassing system, a G1315B diode array detector, a G1316A column thermostat, and a G1313A automatic sample injection device. Chromatographic analysis was carried out on a

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21

YAMAUCHI, Yoshio. "Supercritical Fluid Extraction and Chromatography." Journal of Synthetic Organic Chemistry, Japan 54, no. 5 (1996): 395–99. http://dx.doi.org/10.5059/yukigoseikyokaishi.54.395.

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22

Chester, T. L., J. D. Pinkston, and D. E. Raynie. "Supercritical Fluid Chromatography and Extraction." Analytical Chemistry 68, no. 12 (1996): 487–514. http://dx.doi.org/10.1021/a1960017i.

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23

Chester, T. L., J. D. Pinkston, and D. E. Raynie. "Supercritical Fluid Chromatography and Extraction." Analytical Chemistry 70, no. 12 (1998): 301–20. http://dx.doi.org/10.1021/a1980017d.

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24

Pilviö, Riitta, and Michael Bickel. "Actinoid separations by extraction chromatography." Applied Radiation and Isotopes 53, no. 1-2 (2000): 273–77. http://dx.doi.org/10.1016/s0969-8043(00)00142-1.

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25

Chester, T. L., J. D. Pinkston, and D. E. Raynie. "Supercritical fluid chromatography and extraction." Analytical Chemistry 64, no. 12 (1992): 153–70. http://dx.doi.org/10.1021/ac00036a009.

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26

Chester, T. L., J. D. Pinkston, and D. E. Raynie. "Supercritical Fluid Chromatography and Extraction." Analytical Chemistry 66, no. 12 (1994): 106–30. http://dx.doi.org/10.1021/ac00084a006.

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27

Block, C. "Supercritical fluid extraction & chromatography." TrAC Trends in Analytical Chemistry 11, no. 2 (1992): V. http://dx.doi.org/10.1016/0165-9936(92)80074-g.

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28

Pawliszyn, J. "Supercritical fluid chromatography and extraction." TrAC Trends in Analytical Chemistry 11, no. 8 (1992): v—vi. http://dx.doi.org/10.1016/0165-9936(92)87085-x.

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29

Poole, Colin F. "Supercritical fluid extraction and chromatography." Journal of Chromatography A 1250 (August 2012): 1. http://dx.doi.org/10.1016/j.chroma.2012.05.001.

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30

Stanczyk, Frank Z. "Reliability of Extraction/Chromatography RIAs." Clinical Chemistry 50, no. 4 (2004): 778. http://dx.doi.org/10.1373/clinchem.2004.031492.

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31

Karpushyna, S. A., S. V. Baiurka, and S. I. Merzlikin. "Laboratory toxicological diagnosis of trazodone intoxications." Clinical pharmacy 25, no. 1 (2021): 57–62. http://dx.doi.org/10.24959/cphj.21.1544.

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When determining the cause of poisoning by antidepressant drugs, the data of laboratory toxicological studies of biofluids for the presence of this group of drugs are of key importance. Aim. To develop the methods for determining the antidepressant drug trazodone in the blood and urine samples using high-performance liquid chromatography with a UV spectrophotometric detection, which is suitable for analytical diagnosis of the thymoleptics intoxications. Materials and methods. The model samples of human biofluids spiked with trazodone were studied. The antidepressant was isolated from the blood

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32

Akhter, Suriyah, Sirajuddin Ahmed, Weqar Ahmed Siddiqui, and Sayeed Ahmad. "Development of Analytical Technique for Extraction of Commonly used Antibiotics in River Yamuna Based on liquid-liquid extraction." Oriental Journal Of Chemistry 39, no. 1 (2023): 114–25. http://dx.doi.org/10.13005/ojc/390113.

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Concentration of pharmaceutical especially antibiotics in different ecosystems of environment is incredibly challenging. To enable quick, sensitive, and targeted determination at trace levels, designing of appropriate analytical methods is becoming important. Different techniques like liquid chromatography-tandem mass spectrometry (LC-MS/MS) and gas chromatography-mass spectrometry (GC-MS) have been used widely. One of the environment friendly technique, Liquid- liquid extraction (LLE) was used for the extraction of some commonly used antibiotics in different samples of river Yumana, because o

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33

Rohit Saxena. "EXPLORING APPROACHES FOR INVESTIGATING PHYTOCHEMISTRY: METHODS AND TECHNIQUES." MEDALION JOURNAL: Medical Research, Nursing, Health and Midwife Participation 4, no. 2 (2023): 65–73. http://dx.doi.org/10.59733/medalion.v4i2.76.

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The extraction, isolation, and analysis of bioactive compounds from plants are fundamental in the study of medicinal plants. This review explores various techniques and methods used for the extraction, isolation, and analysis of bioactive compounds from plant materials. Traditional methods such as maceration, percolation, and Soxhlet extraction are commonly used, but novel techniques have emerged to enhance efficiency and selectivity. Microwave-assisted extraction (MAE), ultrasound-assisted extraction (UAE), pressurized liquid extraction (PLE), supercritical fluid extraction (SFE), and enzyme-

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34

Hoang Quoc, Anh. "A mini-review on analytical methods for polycyclic aromatic hydrocarbons in Vietnamese food and beverage samples." Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam 6, no. 3 (2023): 231–45. http://dx.doi.org/10.47866/2615-9252/vjfc.4114.

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Polycyclic aromatic hydrocarbons (PAHs) are a common class of organic pollutants&nbsp;in the environment and are of great research interest because of their high toxicity, including&nbsp;carcinogenicity and mutagenicity. Food is an important source of PAHs exposure in humans,&nbsp;so analysis of PAHs in food is an essential task of food safety testing. This review article&nbsp;gathers information about the analysis methods of PAHs that has been applied in previous&nbsp;studies on food and beverage samples in Vietnam, including steps of extraction, purification&nbsp;of e

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35

Hammack, Walter, Mary C. Carson, Barbara K. Neuhaus, et al. "Multilaboratory Validation of a Method To Confirm Chloramphenicol in Shrimp and Crabmeat by Liquid Chromatography-Tandem Mass Spectrometry." Journal of AOAC INTERNATIONAL 86, no. 6 (2003): 1135–43. http://dx.doi.org/10.1093/jaoac/86.6.1135.

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Abstract An existing method for chloramphenicol (CAP) determination in shrimp using a gas chromatograph with electron capture detector was adapted for confirmation of CAP with a liquid chromatograph interfaced to a triple quadrupole mass spectrometer. CAP residues are extracted from tissue with ethyl acetate, isolated via liquid–liquid extraction, and concentrated by evaporation. Extracts are chromatographed by using a reversed-phased column and analyzed by electrospray negative mode tandem mass spectrometry. Four product ions (m/z 152, 176, 194, and 257) of precursor m/z 321 were monitored. M

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36

Ziembowicz, Sabina, Małgorzata Kida, and Piotr Koszelnik. "Development of an analytical method for dibutyl phthalate (DBP) determination in water samples using gas chromatography." E3S Web of Conferences 44 (2018): 00200. http://dx.doi.org/10.1051/e3sconf/20184400200.

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The aim of the work described here was to develop and validate a method by which dibutyl phthalate may be subject to determinations using solid phase extraction and gas chromatography. Optimization of the chromatographic method was based on the selection of working conditions for both the chromatograph and the detector. Following the optimization of extraction and separation parameters, the method was validated by evaluating specificity, the analytical curve, linearity, limits of detection and quantification and recovery. The proposed method has been evaluated in terms of linearity, over a ran

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37

Dilek Tepe, Hafize, and Fatma Doyuk. "Comparison of Microwave, Ultrasonic Bath and Homogenizer Extraction Methods on the Bioactive Molecules Content of Green Tea (Camellia Sinensis) Plant." Celal Bayar Üniversitesi Fen Bilimleri Dergisi 19, no. 1 (2023): 87–95. https://doi.org/10.18466/cbayarfbe.1169751.

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In this study, the effects of three different extraction methods on the antioxidant capacity, phenolic component, volatile organic molecule and amino acid contents of green tea (Camellia sinensis) leaves were compared. Microwave digestion assisted extraction (MDAE), ultrasonic bath assisted extraction (UBAE) and homogenizer assisted extraction (HAE) methods were used as extraction methods. When the MDAE, UBAE and HAE extraction methods were compared according to the ferric reducing antioxidant power (FRAP) antioxidant activity results, 51.95, 50.9 and 13.8 TE/g dry weight (DW) results were obt

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38

Sonbol, Heba, Hager Ebrahim, Monika Malak, et al. "Application of a Small Protein-Coated Column to Trap, Extract and Enrich Carbamazepine Directly from Human Serum for Direct Chromatographic Analysis." Separations 10, no. 2 (2023): 71. http://dx.doi.org/10.3390/separations10020071.

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An automated solid phase extraction (SPE) protocol to determine carbamazepine in human serum has been developed and validated using a simple, rabid and sensitive liquid chromatography-based bio-analytical method. Extraction of carbamazepine was carried out using an on-line SPE tool of a short protein-coated (PC) ODS silica pre-column (PC-ODS-pre-column) and phosphate buffer saline (PBS) with a pH of 7.4 as an extraction solvent. There are two distinct chromatographic modes used by PC-ODS-pre-column. While carbamazepine trapping required reversed-phase liquid chromatography, proteins were extra

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Wang, Ze, Qi Wang, Jinkui Zhang, Pengcheng Lin, and Jun Dang. "An Integrated Chromatographic Strategy for the Large-Scale Extraction of Ergosterol from Tulasnellaceae sp." Separations 9, no. 7 (2022): 176. http://dx.doi.org/10.3390/separations9070176.

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A reliable chromatographic strategy is crucial for the extraction of target compounds from natural sources as it is related to the preparation efficiency, as well as the purity of the compounds. In this study, medium-pressure normal-phase liquid chromatography and high-pressure reverse-phase liquid chromatography were combined to prepare and purify ergosterol from Tulasnellaceae sp of Gymnadenia orchidis. First, Tulasnellaceae sp. was extracted three times (2.0 L and 2 h each time) with ethyl acetate, and the 6.0 L of extract solution was concentrated under reduced pressure to yield 2.2 g of c

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40

Philip Horwitz, E., Daniel R. McAlister, and Mark L. Dietz. "Extraction Chromatography Versus Solvent Extraction: How Similar are They?" Separation Science and Technology 41, no. 10 (2006): 2163–82. http://dx.doi.org/10.1080/01496390600742849.

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41

Patel, N. A., and A. P. Jadhav. "EXTRACTION AND ISOLATION OF NUCIFERINE FROM LOTUS LEAVES USING FLASH CHROMATOGRAPHY." INDIAN DRUGS 54, no. 01 (2017): 55–57. http://dx.doi.org/10.53879/id.54.01.10684.

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Nelumbo nucifera Gaertn (Family: Nelumbonaceae), commonly known as lotus, is an aquatic perennial plant. The lotus leaves are used to treat fever, hematemesis, hyperlipidaemia and obesity. The leaves are rich in alkaloids such as nuciferine, roemerine, pronuciferine and N-nornuciferine, which are responsible for biological activity of leaf. In the present work, rapid and efficient flash chromatographic process for selective isolation of nuciferine from Nelumbo nucifera Gaertn was developed. The rate of extraction and purity of nuciferine depends upon the solvent used for extraction and optimiz

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42

Rahim, Muhammad Abdul, Hudda Ayub, Aqeela Sehrish, et al. "Essential Components from Plant Source Oils: A Review on Extraction, Detection, Identification, and Quantification." Molecules 28, no. 19 (2023): 6881. http://dx.doi.org/10.3390/molecules28196881.

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Анотація:

Oils derived from plant sources, mainly fixed oils from seeds and essential oil from other parts of the plant, are gaining interest as they are the rich source of beneficial compounds that possess potential applications in different industries due to their preventive and therapeutic actions. The essential oils are used in food, medicine, cosmetics, and agriculture industries as they possess antimicrobial, anticarcinogenic, anti-inflammatory and immunomodulatory properties. Plant based oils contain polyphenols, phytochemicals, and bioactive compounds which show high antioxidant activity. The ex

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43

Bederska-Łojewska, Dorota, Marek Pieszka, Aleksandra Marzec, et al. "Physicochemical Properties, Fatty Acid Composition, Volatile Compounds of Blueberries, Cranberries, Raspberries, and Cuckooflower Seeds Obtained Using Sonication Method." Molecules 26, no. 24 (2021): 7446. http://dx.doi.org/10.3390/molecules26247446.

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Every year, thousands of tons of fruit seeds are discarded as agro-industrial by-products around the world. Fruit seeds are an excellent source of oils, monounsaturated fatty acids, and n-6 and n-3 polyunsaturated essential fatty acids. This study aimed to develop a novel technology for extracting active substances from selected seeds that were obtained after pressing fruit juices. The proposed technology involved sonification with the use of ethyl alcohol at a low extraction temperature. Seeds of four species—blueberry (Vaccinium myrtillus L.), raspberry (Rubus idaeus), cranberry (Vaccinium m

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Liu, Mo, Mengxi Wang, Dongya Chen, Lingyan Kong, Mei Xue, and Hong Lei. "Extraction and Analysis of Flaxseed Oil by Supercritical CO2 Method Optimized by RSM and GC-MS." Current Topics in Nutraceutical Research 17, no. 1 (2018): 11–16. http://dx.doi.org/10.37290/ctnr2641-452x.17:11-16.

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Flaxseed oil has already been widely used in food production in recent years as of its prominent biological functions. This study was aimed to obtain high-quality flaxseed oil and find the suitable extraction parameters, exploiting response surface methodology of a three-variable, three-level Box-Behnken experimental design. In this study, supercritical CO<sub>2</sub> extraction technology was used to extract flaxseed oil. The chemical composition of flaxseed oil was investigated by Gas Chromatography-Mass Spectroscopy. Results showed that the optimal conditions were extraction time of 4.58 h,

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45

Gülle, Sumeyra, Halil Ibrahim Ulusoy, Abuzar Kabir, et al. "Application of a fabric phase sorptive extraction-high performance liquid chromatography-photodiode array detection method for the trace determination of methyl paraben, propyl paraben and butyl paraben in cosmetic and environmental samples." Analytical Methods 11, no. 48 (2019): 6136–45. http://dx.doi.org/10.1039/c9ay02260k.

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Анотація:

A new sample preparation and chromatographic separation method for methyl, propyl and butyl paraben in cosmetic and environmental samples has been developed, based on fabric phase sorptive extraction and high performance liquid chromatography-photodiode array detection.

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46

Mol, Hans G. J., Ruud C. J. Van Dam, Rob J. Vreeken, and Odile M. Steijger. "Determination of Chlormequat in Pears by Liquid Chromatography/Mass Spectrometry." Journal of AOAC INTERNATIONAL 83, no. 3 (2000): 742–47. http://dx.doi.org/10.1093/jaoac/83.3.742.

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Abstract A straightforward and reliable method was developed for the determination of chlormequat in pears by liquid chromatography/mass spectrometry (LC/MS). Water and methanol were compared as extraction solvents. Because no significant differences in extraction efficiency or repeatability were found, water was chosen as the extraction solvent. The extracts were analyzed without cleanup by either an ion-trap liquid chromatograph/mass spectrometer in the single MS mode or a triple-quadrupole instrument in the MS/MS mode, using electrospray ionization. Both instruments were equally suitable fo

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47

Rudakov, Yaroslav O., Vladimir F. Selemenev, Ludmila V. Rudakova, and Oleg B. Rudakov. "Chromatographic approaches to food quality control by chemical compo-sition." Сорбционные и хроматографические процессы 24, no. 2 (2024): 197–208. http://dx.doi.org/10.17308/sorpchrom.2024.24/12125.

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Анотація:

The article provides an overview of chromatographic methods, which, when used comprehensively, ensure food quality control and safety. It considers gas chromatography methods that allow analysing volatile components in products using a flame ionization detector, an electron capture detector, and mass-selective detectors (GC-FID, GC-ECD, GC-MS, and GC-MS/MS). The article provides a list of analytes that can be detected by high performance liquid chromatography in combination with refractometric, spectrometric, and mass selective detectors (HPLC-RMD, HPLC-UV, HPLC-SPD, HPLC-MS, and HPLC-MS/MS).

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48

Annesley, T., K. Matz, L. Balogh, L. Clayton, and D. Giacherio. "Liquid-chromatographic analysis for cyclosporine with use of a microbore column and small sample volume." Clinical Chemistry 32, no. 7 (1986): 1407–9. http://dx.doi.org/10.1093/clinchem/32.7.1407.

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Abstract This liquid-chromatographic assay requires 0.2 to 0.5 mL of whole blood, avoids the use of diethyl ether, and consumes only 10 to 20% of the solvents used in prior methods. Sample preparation involves an acidic extraction with methyl-t-butyl ether, performed in a 13 X 100 mm disposable glass tube, then a short second extraction of the organic phase with sodium hydroxide. After evaporation of the methyl-t-butyl ether, chromatography is performed on an "Astec" 2.0-mm (i.d.) octyl column. We compared results by this procedure with those by use of earlier larger-scale extractions and thei

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49

Lončarić, Ante, Maria Celeiro, Antun Jozinović, et al. "Green Extraction Methods for Extraction of Polyphenolic Compounds from Blueberry Pomace." Foods 9, no. 11 (2020): 1521. http://dx.doi.org/10.3390/foods9111521.

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In this study, green extraction methods—high voltage electrical discharges (HVED), pulsed electric field (PEF), and ultrasound-assisted extraction (UAE)—were compared in terms of extraction yield of total and individual polyphenolic compounds, as well as the antioxidant capacity of blueberry pomace extracts. All extractions were performed with methanol- and ethanol-based solvents. The highest total polyphenols content (TPC) (10.52 mg of gallic acid equivalent (GAE) per g of dry weight (dw)) and antioxidant activity (AA) (0.83 mmol TE/g dw) were obtained by PEF-assisted extraction in the ethano

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50

Liu, Mingyuan, Jie Zhou, Jingkai Qin, et al. "Evaluation of High Vacuum Flavor Extraction Device as a Novel Technique for the Extraction of Volatile Compounds." Foods 13, no. 19 (2024): 3206. http://dx.doi.org/10.3390/foods13193206.

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In this study, a high vacuum flavor extraction (HVE) device was developed to address the limitations of traditional extraction methods, such as extended extraction times and artifact generation during high-temperature processes. Firstly, the repeatability and precision of the HVE method were evaluated through quantitative analysis of twelve volatile odor compounds across seven replicate extractions using gas chromatography–flame ionization detection (GC-FID). The results showed that the HVE system achieved a mean relative standard deviation (RSD) of 11.60 ± 1.79% and a recovery rate of 90.55 ±

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