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Artículos de revistas sobre el tema "Chromatography"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 25 de julio de 2025

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1

Arzu Ibragimova, Arzu Ibragimova. "BENEFITS OF USING A FID TO MEASURE THE MULTICOMPONENT GAS MIXTURES." PIRETC-Proceeding of The International Research Education & Training Centre 27, no. 06 (2023): 131–39. http://dx.doi.org/10.36962/piretc27062023-131.

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The development of the oil and gas complex is one of the priority areas of the Azerbaijan economy. Oil and gas are among the most competitive Azerbaijan goods and are in high and stable demand from global consumers. Therefore, increased attention is paid to product quality. One of the methods for quality control of petroleum products is gas chromatography. Today it is a widely used physical and chemical research method. The capabilities of a gas chromatography are mainly determined by the enormous separating power of the chromatographic columns and the characteristics of the detectors. If the

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2

Tong, Daixin, Keith D. Bartle, Anthony A. Clifford, and Robert E. Robinson. "Unified chromatograph for gas chromatography, supercritical fluid chromatography and micro-liquid chromatography." Analyst 120, no. 10 (1995): 2461. http://dx.doi.org/10.1039/an9952002461.

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3

Zhang, Jing, and Hongye Zhang. "Research progress on the detection of water-soluble vitamins in food using liquid chromatography." Theoretical and Natural Science 37, no. 1 (2024): 158–69. http://dx.doi.org/10.54254/2753-8818/37/20240183.

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Currently, liquid chromatography is widely used for the analysis and determination of water-soluble vitamins (WSVs) in functional foods. However, due to the diversity of sample characteristics and the requirement for purification accuracy, the chromatographic conditions and specific methods used vary. This paper reviews the chromatographic conditions of liquid chromatography techniques for detecting WSVs in food, as well as the selection of liquid chromatography methods in different application fields. The chromatographic conditions include chromatographic columns, column temperature, mobile p

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4

Dolgonosov, A. M., A. G. Prudkovskii, E. A. Zaitseva, N. K. Kolotilina, and A. A. Dolgonosov. "Mathematical Modelling in Analytical Chromatography: Problems and Solutions." Journal of Analytical Chemistry 76, no. 11 (2021): 1233–44. http://dx.doi.org/10.1134/s1061934821110046.

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Abstract Based on an analysis of the results of original research performed in the Laboratory of Sorption Methods of the Vernadsky Institute of Geochemistry and Analytical Chemistry of the Russian Academy of Sciences within the project “Mathematical Chromatograph,” the review covers the aim and strategy of the imitation modeling of high-performance chromatography; associated problems of the theory of intermolecular interactions; classifications of polar stationary phases by their selectivity; descriptions of the kinetics and dynamics of sorption processes, choice of the composition of multicom

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5

Ogierman, Leonard. "Gas Chromatography of Uracil Herbicides by On-Column Methylation with Trimethylanilinium Hydroxide." Journal of AOAC INTERNATIONAL 69, no. 5 (1986): 912–14. http://dx.doi.org/10.1093/jaoac/69.5.912.

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Abstract Substituted uracil herbicides injected into a gas chromatograph react with trimethylanilinium hydroxide to give iV-methyl derivatives with good gas chromatographic properties. Maximum methylation is obtained when the molar ratio of methylating reagent to herbicide is ca 4:1. This technique for preparing derivatives provides rapid qualitative and quantitative chromatography of the substances examined. Chromatographic response was linear with increased concentration for the synthetic standard and the on-column product of uracil herbicide. The proposed derivatization method was used to a

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6

Adel, E. Ibrahim, Elhenawee Magda, Saleh Hanaa, and M. Sebaiy Mahmoud. "Overview on liquid chromatography and its greener chemistry application." Annals of Advances in Chemistry 5, no. 1 (2021): 004–12. http://dx.doi.org/10.29328/journal.aac.1001023.

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This literature review is concerning with liquid chromatography specifically high performance liquid chromatography (HPLC), Ultra high performance liquid chromatography (UHPLC), chromatography theory, chromatographic parameters, monolithic columns, principles of green chemistry and its application ingreen chromatography.

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7

Custodio-Mendoza, Jorge Antonio, Patryk Pokorski, Havva Aktaş, Alicja Napiórkowska, and Marcin Andrzej Kurek. "Advances in Chromatographic Analysis of Phenolic Phytochemicals in Foods: Bridging Gaps and Exploring New Horizons." Foods 13, no. 14 (2024): 2268. http://dx.doi.org/10.3390/foods13142268.

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Chromatographic analysis of phenolic phytochemicals in foods has significantly advanced over the past decade (2014–2024), meeting increasing demands for precision and efficiency. This review covers both conventional and advanced chromatographic techniques used for detecting phenolic phytochemicals in foods. Conventional methods like High-Performance Liquid Chromatography, Ultra High-Performance Liquid Chromatography, Thin-Layer Chromatography, and Gas Chromatography are discussed, along with their benefits and limitations. Advanced techniques, including Hydrophilic Interaction Liquid Chromatog

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8

Meng, Xin Xin, and Shu Lin Yang. "Comparison of Gas Chromatography and Liquid Chromatogram Detecting Pesticide Residue." Applied Mechanics and Materials 539 (July 2014): 113–16. http://dx.doi.org/10.4028/www.scientific.net/amm.539.113.

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The existing methods of detecting pesticide residue include gas chromatography, high performance liquid chromatography, gas chromatograph-mass, liquid chromatograph-mass, capillary electrophoresis, radioimmunoassay, biosensor and rapid detection on the spot. The paper analyzes the comparison of gas chromatography and liquid chromatogram detecting pesticide residue, for achieving the development tendency and the future goal of analyzing pesticide residue.

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9

Denisov, I. S., V. V. Korotkov, and D. S. Smirnov. "Gaschromatographic monitoring of volatile pollutants of urban air: optimizing analysis and concentrating." Sanitarnyj vrač (Sanitary Doctor), no. 10 (October 1, 2020): 70–76. http://dx.doi.org/10.33920/med-08-2010-08.

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For determining 22 volatile organic compounds in the atmospheric air, the operating modes of the gas chromatographic complexes «chromatography-mass spectrometer — two-stage thermodesorber» and «gas chromatograph with 2 FID — static headspace analysis sampler» are optimized. The modes provide the values of the separation coefficients of the chromatographic peaks in the range of 1.5 ÷ 21. It has been experimentally established that the highest desorption efficiency of volatile organic compounds is registered when the sample is concentrated into Tenax TA sorption tubes.

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10

Omelchuk, Sergii T., Alina I. Syrota, and Anna V. Blagaia. "THE NEED FOR IMPROVEMENT OF FUNGICIDES RESIDUAL QUANTITIES CONTROL METHODS IN THE CONDITIONS OF THE DOMESTIC REGULATORY BASE HARMONIZATION." Wiadomości Lekarskie 75, no. 10 (2022): 2455–61. http://dx.doi.org/10.36740/wlek202210126.

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The aim: To develop highly sensitive analytical methods for the determination of the systemic phenylamide class fungicide – Metalaxyl-M residues in watermelons and grapes to reduce the risk of hazardous effects on workers’ and public health. Materials and methods: Conditions for Metalaxyl-M detection by gas-liquid chromatography (GLC) using a chromatographic capillary column SH-Rxi-5ms (length – 30 m, inner diameter – 0.25 mm, layer thickness – 0.25 μm) were determined. The optimal conditions for chromatography of Metalaxyl-M were established: column thermostat temperature – 220°С, evaporator

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11

ZHANG, Xin. "Chromatographic Band and Chromatographic Peak in Chromatography." University Chemistry 32, no. 9 (2017): 52–58. http://dx.doi.org/10.3866/pku.dxhx201703004.

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12

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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13

Peterson, Robert E., Gail M. Shannon, and Odette L. Shotwell. "Purification of Cyclopiazonic Acid by Liquid Chromatography." Journal of AOAC INTERNATIONAL 72, no. 2 (1989): 332–35. http://dx.doi.org/10.1093/jaoac/72.2.332.

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Abstract A purification procedure for cyclopiazonic acid has been developed, using sequential preparative and semi-preparative liquid chromatography. Crude cyclopiazonic acid (324 mg) was extracted from a 1 L fermentation medium with chloroform-methanol (80 + 20), dried, dissolved in chloroform, and chromatographed on an oxalic acid/ silica preparative column with chloroform-methanol (99 + 1) as the eluant. A semi-preparative oxalic acid/silica column and chloroform- methanol (99.5 + 0.5) were then used for rechromatography of the partially purified cyclopiazonic acid. This second chromatograp

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14

Swati, Pachore Anushka shinde Sandip laware. "A Review On Chromatographic Separation Techniques." International Journal of Pharmaceutical Sciences 2, no. 10 (2024): 758–66. https://doi.org/10.5281/zenodo.13935296.

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Chromatographic separation techniques are essential tools in analytical chemistry, utilized for the isolation, identification, and quantification of complex mixtures. This review provides an overview of various chromatographic methods, including gas chromatography (GC), liquid chromatography (LC), and their advanced variations such as high-performance liquid chromatography (HPLC) and supercritical fluid chromatography (SFC). Each technique’s principles, advantages, and limitations are discussed, along with their applications across diverse fields, including pharmaceuticals, environmental

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15

Kataev, S. S., O. N. Dvorskaya, M. A. Gofenberg, A. V. Labutin, and A. B. Melentyev. "ANALYTICAL FEATURES OF SYNTHETIC MDMB(N)-073F CANNABIMIMETICS AND ITS MARKERS IN BIOLOGICAL MATERIAL." Pharmacy & Pharmacology 7, no. 4 (2019): 184–97. http://dx.doi.org/10.19163/2307-9266-2019-7-4-184-197.

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The aim of the research is to study both analytical features of synthetic MDMB(N)-073F cannabimimetics of indazole carboxamides group by gas chromatography methods combined with tandem mass spectrometry (GC-MS) and high performance liquid chromatography with high-resolution mass spectrometry (HPLC-HRMS) as well as characteristics of the major MDMB(N)-073F metabolite, its glucuronide and derivatives, using gas chromatography with mass-spectrometric (GC-MS) detection and high-performance liquid chromatography (HPLC) with MS/MS mass spectrometry (HPLC-MS/MS) in urine samples to be applied in expe

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16

Orlenko, Dmytro, Volodymyr Yakovenko, Vyacheslav Plastun, and Liliia Vyshnevska. "DEVELOPMENT AND VALIDATION OF METHODS FOR QUANTITATIVE DETERMINATION OF SODIUM HYALURONATE IN THE COMPOSITION OF COMBINED DENTAL GEL." EUREKA: Health Sciences 5 (September 30, 2020): 72–81. http://dx.doi.org/10.21303/2504-5679.2020.001420.

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According to the EP monograph "Sodium hyaluronate" for identification they use the infrared transmission spectrum of the substance, quantification is carried out by spectrophotometry. The aim of the work was to develop a method for quantitative determination of hyaluronic acid in the gel in the presence of other substances and its validation. Materials and Methods. The object of the study were samples of combined dental gel of the following composition: metronidazole benzoate 16 mg/g, miramistin 5 mg / g, sodium hyaluronate 2 mg / g. Identification and quantification of sodium hyaluronate was

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17

Zui, O. "Development of ion chromatography in Ukraine." Zurnal Hromatograficnogo tovaristva 21, no. 67 (2021): 39–45. http://dx.doi.org/10.15407/zht2021.67.039.

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The ways of development of ion chromatography in Ukraine from the eighties of the last century to the present time are shown. The achievements of research institutes, in particular, the Dumansky Institute of Colloid Chemistry and Water Chemistry of the National Academy of Sciences of Ukraine, in the development of ion chromatographic methods for the analysis of organic and inorganic anions in various objects, including natural and drinking waters, are highlighted. Scientists of Ukraine (A.T. Pilipenko, O.V. Zuy, A.V. Terletskaya) compared commercially available sorbents for ion chromatography

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18

Christopoulou, C. N., and E. G. Perkins. "Chromatographic studies on fatty acid dinners: Gas-liquid chromatography, high performance liquid chromatography and thin-layer chromatography." Journal of the American Oil Chemists' Society 66, no. 9 (1989): 1353–59. http://dx.doi.org/10.1007/bf03022761.

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19

Gertsiuk, Modest. "Chromatography in Ukraine: Development and Achievements." Separations 9, no. 5 (2022): 114. http://dx.doi.org/10.3390/separations9050114.

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The development of chromatographic science in Ukraine is due to the widespread use of chromatography to solve practical problems. The centers of chromatographic research in Ukraine are in large cities: Kyiv, Kharkiv, Lviv, Odessa, and others. Along with the development of chromatographic research methods, analysis methods for control of food and agricultural raw materials, medicinal products, petroleum products, and determination of the environmental pollution state are created. Chromatography is used in medicine, pharmacology, biology, and other sciences.

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20

Durai Ananda Kumar T, Sai Charan, Venkateswarlu A, and Supriya Reddy K. "Evolution of liquid chromatography: Technologies and applications." International Journal of Research in Pharmaceutical Sciences 11, no. 3 (2020): 3204–11. http://dx.doi.org/10.26452/ijrps.v11i3.2449.

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Liquid chromatographic offers efficient analyte separation employing high pressure pumps. The reversed phase high performance liquid chromatography (RP-HPLC) is widely utilized in the purity testing and quantitative determination of pharmaceuticals and neutraceuticals. The limitations of traditional liquid chromatography such as particle size, resolution and selectivity demanded for the developments and Waters Corporation developed ultraperformance liquid chromatography (UPLC). Ultrafast liquid chromatography (UFLC) is another milestone, which offers faster and efficient separation. Multidimen

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21

Hill, Derek A., Paul Mace, and Donald Moore. "Frontal chromatographic techniques in preparative chromatography." Journal of Chromatography A 523 (December 1990): 11–21. http://dx.doi.org/10.1016/0021-9673(90)85007-i.

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22

Hussein, Jihan. "Principles and Applications of High-Performance Liquid Chromatography (HPLC): A Review." Biomedical and Pharmacology Journal 18, no. 2 (2025): 1087–91. https://doi.org/10.13005/bpj/3154.

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Chromatography is a process of separation that used to separate constituents in a mixture. This technique included two main phases: The stationary phase and the mobile phase. There are different types of chromatographic devices including gas chromatography, liquid chromatography, and ion exchange chromatography besides initial high performance liquid chromatography (HPLC). In this review we emphasis on the principles and applications of HPLC comparing with other devices of chromatography. Also we highlighted on the role of HPLC and its applications in different fields like medical, pharmaceuti

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23

Knowles, David E., Bruce E. Richter, Michele B. Wygant, Lori Nixon, and Marion R. Andersen. "Supercritical Fluid Chromatography: A New Technique for AOAC." Journal of AOAC INTERNATIONAL 71, no. 3 (1988): 451–57. http://dx.doi.org/10.1093/jaoac/71.3.451.

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Abstract Supercritical fluid chromatography (SFC) is a chromatographic technique that, in many ways, is a hybrid of gas chromatography and liquid chromatography and offers many advantages over both. As this technique continues to grow in use, SFC will become very advantageous to the AOAC analyst.

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Tsarev, V. N., N. G. Bazarnova, and I. V. Mikushina. "Development of a Preparative Method for Obtaining an Enantiomerically Pure Substance of Salbutamol by Supercritical Fluid Chromatography." Drug development & registration 11, no. 4 (2022): 160–69. http://dx.doi.org/10.33380/2305-2066-2022-11-4-160-169.

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Introduction. An increasing number of studies conducted in various countries in the field of biopharmacy convincingly show the differences in the physiological effects on the human body of stereoisomers of pharmaceutical substances. As a rule, one of the enantiomers has the necessary pharmacological effect, the other enantiomer is either inert or has a negative side effect. Currently, it is important to obtain enantiomerically pure pharmacological substances from their racemic mixtures.Aim. Obtaining the R-isomer of salbutamol from a racemic mixture of salbutamol and developing a preparative p

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25

Narzullo, Saidov, Smelova Natalia, Garna Natalya, Koretnik Oksana, Khanina Nataliia та Gubar Svetlana. "Development of HPLC method for quantitative determination of new perspective APhI with anti-ulcer activity of trіаzоprazol". ScienceRise: Pharmaceutical Science, № 6(16) (28 грудня 2018): 41–46. https://doi.org/10.15587/2519-4852.2018.153387.

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<strong>Aim.</strong> Development of optimal, high-precision, reproducible method of quantitative determination of triazoprazole in substance using the method of high performance liquid chromatography. <strong>Materials and methods.</strong> Physico-chemical (high-performance liquid chromatography) and mathematical (statistical processing of results) methods of research were used to achieve this goal. Chromatography was performed on a liquid chromatograph Agilent 1290 Infinity II with diode-array (LC 1290) detector and quadrupole-time-of-flight (QTOF 6530) mass analyzer. Fixed p

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26

Chen, Yi, Cong Ming Zou, Jun Bin, Min Yang, and Chao Kang. "Multilinear Mathematical Separation in Chromatography." Separations 8, no. 3 (2021): 31. http://dx.doi.org/10.3390/separations8030031.

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Chromatography is a powerful and generally applicable method for the analytical separation and quantification of the chemical constituents in complex mixtures because chromatographic separation can provide high selectivity by isolating all analytes from interferences. Multiway analysis based on the multilinear model is an increasingly widely used method for interference-free and fast determination of the chemical constituents also in complex mixtures because multilinear mathematical separation can provide high selectivity by extracting the pure signal of the analyte from the mixed signal of a

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27

Zimenkina, Natalya I., and Vladimir A. Kurkin. "Tincture of <i>Juglans nigra</i> L. bark: peculiarities of standardization." Aspirantskiy Vestnik Povolzhiya 21, no. 5-6 (2021): 36–47. http://dx.doi.org/10.55531/2072-2354.2021.21.3.36-47.

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BACKGROUND: Juglans nigra L. is a species of trees in the Juglandaceae family. This plant of the genus Juglans L. has not been sufficiently studied in comparison with other species, including Juglans regia L. It is a perspective medicinal plant raw material, its derivatives have an antimicrobial, general tonic effect. The known antimicrobial and general tonic activity of Juglans L preparations presented on the pharmaceutical market is probably due to substances of a flavonoid nature. These data indicate the relevance of studying the flavonoids of the Juglans nigra L. bark. AIM: The aim o

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28

Dmytro, Orlenko, Yakovenko Volodymyr, Plastun Vyacheslav, and Vyshnevska Liliia. "DEVELOPMENT AND VALIDATION OF METHODS FOR QUANTITATIVE DETERMINATION OF SODIUM HYALURONATE IN THE COMPOSITION OF COMBINED DENTAL GEL." EUREKA: Health Sciences, no. 5 (September 30, 2020): 72–81. https://doi.org/10.21303/2504-5679.2020.001420.

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According to the EP monograph "Sodium hyaluronate" for identification they use the infrared transmission spectrum of the substance, quantification is carried out by spectrophotometry. <strong>The aim</strong> of the work was to develop a method for quantitative determination of hyaluronic acid in the gel in the presence of other substances and its validation. <strong>Materials and Methods. </strong>The object of the study were samples of combined dental gel of the following composition: metronidazole benzoate 16 mg/g, miramistin 5 mg / g, sodium hyaluronate 2 mg / g. Identi

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29

Rudakova, Olha, Svitlana Gubar, Nataliia Smielova, Maksym Yaremenko, Nataliia Bevz, and Victoriya Georgiyants. "Development of a unified approach to the method of identification, quantitative determination of active substances and accompanying impurities in a combined drug by HPLC method." ScienceRise: Pharmaceutical Science, no. 2(36) (April 29, 2022): 81–89. http://dx.doi.org/10.15587/2519-4852.2022.255851.

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The aim of the work is to develop a method of identification, quantification of acetylsalicylic and ascorbic acids in the combined presence and concomitant impurities in the combined drug in the form of effervescent powder for preparation of oral solution by liquid chromatography and study of validation characteristics. Materials and methods. ProStar liquid chromatograph with “Varian” spectrophotometric detector. Chromatographic column with a size of 150×4.6 mm, filled with aminopropylsilyl silica gel for chromatography (Supelcosil LC-NH2, “Supelco”) with a precolumn (particle size 3 μm), mobi

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30

Sandesh, J. Srikanth Sandesh, Shyamala, Kurva Swapana, Sirra Balaiah, and J. V. C. Sharma. "A REVIEW ON FLASH CHROMATOGRAPHY AND ITS PHARMACEUTICAL APPLICATIONS." Journal of Biomedical and Pharmaceutical Research 10, no. 1 (2021): 120–24. http://dx.doi.org/10.32553/jbpr.v10i1.850.

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Earlier column chromatography was used for preparative purposes as well as for reaction control in organic synthesis. Column chromatography is an extremely tedious stage in any laboratory and can quickly become a point of congestion for any process lab. Flash chromatography is a technique developed as a modification of preparative column chromatography. This is an air pressure driven technique comprising of medium and short column chromatography, optimised for rapid separation of organic compounds. Modern flash chromatographic system consists of pre- packed plastic cartridges where in the solv

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P., Venkatesh, Kranthi kumar G., Vinod kumar K., and Ammaji SK. "Evolution and Evaluation of Advancement In Chiral Separation." American Journal of PharmTech Research 12, no. 5 (2022): 23–38. https://doi.org/10.5281/zenodo.7270128.

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ABSTRACT The majority of pharmaceuticals used today are chiral. A brief summary of various chiral separation principles and associated separation methods is provided in this review. Liquid chromatography (LC), capillary electrophoresis (CE), high-performance liquid chromatography (HPLC), and gas chromatography (GC) are only a few of the recent advancements addressed. The creation of competent analytical techniques is essential for compliance with the numerous regulatory obligations. The rapid development of chiral separation technologies has been fueled by the current situation in which c

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Manda, Swapna* Rongali Indu Dr. P.V. Madhavi Latha B. Rama Madhuri. "A Comprehensive Review on UHPLC and UPLC: Advancements, Comparison, and Applications." International Journal of Scientific Research and Technology 1, no. 11 (2024): 87–91. https://doi.org/10.5281/zenodo.14173528.

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Ultra-High-Performance Liquid Chromatography (UHPLC) and Ultra Performance Liquid Chromatography (UPLC) are two of the most advanced liquid chromatographic techniques, offering improved separation, sensitivity, and speed over traditional High-Performance Liquid Chromatography (HPLC). While both technologies share similar principles, they differ in system configurations, column technologies, and applications. UHPLC generally refers to any liquid chromatography system capable of using sub-2 µm particles, while UPLC is a proprietary technology developed by Waters Corporation that optimizes

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Kord, Alireza S., and Morteza G. Khaledi. "Chromatographic characteristics of surfactant-mediated separations: micellar liquid chromatography vs ion pair chromatography." Analytical Chemistry 64, no. 17 (1992): 1901–7. http://dx.doi.org/10.1021/ac00041a027.

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Memon, Najma, Tahira Qureshi, Muhammad Iqbal Bhanger, and Muhammad Imran Malik. "Recent Trends in Fast Liquid Chromatography for Pharmaceutical Analysis." Current Analytical Chemistry 15, no. 4 (2019): 349–72. http://dx.doi.org/10.2174/1573411014666180912125155.

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Background: Liquid chromatography is the workhorse of analytical laboratories of pharmaceutical companies for analysis of bulk drug materials, intermediates, drug products, impurities and degradation products. This efficient technique is impeded by its long and tedious analysis procedures. Continuous efforts of scientists to reduce the analysis time resulted in the development of three different approaches namely, HTLC, chromatography using monolithic columns and UHPLC. Methods: Modern column technology and advances in chromatographic stationary phase including silica-based monolithic columns

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35

El Deeb, Sami. "Enhancing Sustainable Analytical Chemistry in Liquid Chromatography: Guideline for Transferring Classical High-Performance Liquid Chromatography and Ultra-High-Pressure Liquid Chromatography Methods into Greener, Bluer, and Whiter Methods." Molecules 29, no. 13 (2024): 3205. http://dx.doi.org/10.3390/molecules29133205.

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This review is dedicated to sustainable practices in liquid chromatography. HPLC and UHPLC methods contribute significantly to routine analytical techniques. Therefore, the transfer of classical liquid chromatographic methods into sustainable ones is of utmost importance in moving toward sustainable development goals. Among other principles to render a liquid chromatographic method green, the substitution of the organic solvent component in the mobile phase with a greener one received great attention. This review concentrates on choosing the best alternative green organic solvent to replace th

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Saake, B., S. Lebioda, and J. Puls. "Analysis of the substituent distribution along the chain of water-soluble methyl cellulose by combination of enzymatic and chemical methods." Holzforschung 58, no. 1 (2004): 97–104. http://dx.doi.org/10.1515/hf.2004.013.

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Abstract Four methyl cellulose samples in the degree of substitution range from 0.5 to 2.0 were characterised by combination of different analytical methods. Samples were analysed regarding their partial degree of substitution by hydrolysis and anion exchange chromatography with pulsed amperometric detection. For calibration of the chromatographic system, standard substances were isolated by preparative HPLC and their structure was confirmed by 13C-NMR spectroscopy. For two methyl cellulose samples per-acetylation and 13C-NMR with inverse gated decoupling was carried out for comparison with th

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More, Siddhant* Ghodekar Smita Jadhav Vaishali Jain Ashish. "HPLC – HIGH PERFORMANCE LIQUID CHROMATOGRAPHY & UPLC – MODERN LIQUID CHROMATOGRAPHIC SYSTEM – A REVIEW ON MODERN LIQUID CHROMATOGRAPHY." INDO AMERICAN JOURNAL OF PHARMACEUTICAL SCIENCES 05, no. 08 (2018): 7590–602. https://doi.org/10.5281/zenodo.1400669.

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<em>Chromatography is a technique which is used for the separation of constituents in a mixture. This technique involves 2 phases stationary and mobile phases.  separation of  this constituents is based on the difference between partition coefficients of the two phases.</em> <em>High Performance Liquid Chromatography is analytical technique for separation, dentification and quantification of constituents in mixture. HPLC is an advanced technique of column liquid chromatography.</em> <em>UPLC – Ultra performance liquid chromatography, modern technique in liquid chromatography.</

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Kortmann, Carlotta, Taieb Habib, Christopher Heuer, Dörte Solle, and Janina Bahnemann. "A Novel 3D-Printed and Miniaturized Periodic Counter Current Chromatography System for Continuous Purification of Monoclonal Antibodies." Micromachines 15, no. 3 (2024): 382. http://dx.doi.org/10.3390/mi15030382.

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Continuous chromatography has emerged as one of the most attractive methods for protein purification. Establishing such systems involves installing several chromatographic units in series to enable continuous separation processes and reduce the cost of the production of expensive proteins and biopharmaceuticals (such as monoclonal antibodies). However, most of the established systems are bulky and plagued by high dead volume, which requires further optimization for improved separation procedures. In this article, we present a miniaturized periodic counter-current chromatography (PCCC) system,

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39

Tsecheev, Arthur T., and Yurii N. Karpenko. "Application of UV spectrophotometry and reversed-phase HPLC to determine the ionization constant of a new biologically active compound." Aspirantskiy Vestnik Povolzhiya 23, no. 2 (2023): 60–65. http://dx.doi.org/10.55531/2072-2354.2023.23.2.60-65.

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Aim to determine the ionization constant (pKa) of the biologically active compound 2-ABPPC by UV spectrophotometry and high performance liquid chromatography (HPLC). Material and methods. The object of the study was the substance 2-ABPPC (2-amino-1-(4-bromophenyl)-5-(3,3-dimethyl-2-oxobutylidene)-4-oxo-4,5-dihydro-1H-pyrrole-3- carboxamide). The methods of UV spectrophotometry and high performance liquid chromatography were used to determine the ionization constant. The spectrophotometric analysis was carried out on a Shimadzu UV-1800 spectrophotometer. The chromatographic determination

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40

Eliashvili, Levan. "Quantification of Glucose and Fructose in Georgian Semi-sweet Wines." Works of Georgian Technical University, no. 2(532) (June 10, 2024): 11–14. http://dx.doi.org/10.36073/1512-0996-2024-2-11-14.

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One of the important parameters for wine certification is the quantitative determination of glucose and fructose, for which the highly efficient liquid chromatographic method is tested and is accurate. The quantitative determination of glucose and fructose in semi-sweet wines using high performance liquid chromatography is discussed in the article. A high-performance liquid chromatograph (HPLC) with a refractive index detector (RID) and a reversed-phase alkali amine chromatography column was used during the analysis. The method showed a high correlation coefficient during calibration (R2 = 0.9

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41

Hanai, Toshihiko. "Quantitative Explanation of Retention Mechanisms in Reversed-phase Mode Liquid Chromatography, and Utilization of Typical Reversed-phase Liquid Chromatography for Drug Discovery." Current Chromatography 6, no. 1 (2019): 52–64. http://dx.doi.org/10.2174/2213240606666190619120733.

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The retention mechanism in reversed-phase liquid chromatography was quantitatively described using log P (octanol-water partition coefficient). The hydrophobic (lipophilic) interaction liquid chromatography was then used to measure the hydrophobicity of a variety of compounds. Furthermore, the technique has been used as an analytical method to determine molecular properties during the drug discovery process. However, log P values cannot be applied to other chromatographic techniques. Therefore, the direct calculation of molecular interactions was proposed to describe the general retention mech

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42

Korobeynikov, S.M., and M.N. Lyutikova. "Investigation of Technological Operations Affecting the Determination of Concentration of Ionol Additive in Insulating Oil in High-Voltage Equipment." Problemele Energeticii Regionale 1(36) (April 15, 2018): 96–105. https://doi.org/10.5281/zenodo.1217282.

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Ionol oxidation inhibitor level control is included into normative indicators list for diagnostics of internal insulation condition of any oil-filled high voltage device. Concentration of oxidation inhibitor in dielectric liquid should be from 0,08 % to 0,40 % mass. Power supply network chemistry laboratories use such methods as spectroscopy, spectrometry, chromatography and many others. Russian insulation service specialists use the method of ionol concentration measurement in oils based on gas-liquid chromatography. In the first place it is related to the fact that gas chromatographs are ins

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43

More, Siddhant* Ghodekar Smita Jadhav Vaishali Jain Ashish. "HPLC – HIGH PERFORMANCE LIQUID CHROMATOGRAPHY & UPLC – ULTRA PERFORMANCE LIQUID CHROMATOGRAPHIC SYSTEM – A REVIEW ON MODERN LIQUID CHROMATOGRAPHY." INDO AMERICAN JOURNAL OF PHARMACEUTICAL SCIENCES 05, no. 08 (2018): 7590–602. https://doi.org/10.5281/zenodo.1401201.

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<em>Chromatography is a technique which is used for the separation of constituents in a mixture. This technique involves 2 phases stationary and mobile phases.  separation of  this constituents is based on the difference between partition coefficients of the two phases.</em> <em>High Performance Liquid Chromatography is analytical technique for separation, dentification and quantification of constituents in mixture. HPLC is an advanced technique of column liquid chromatography.</em> <em>UPLC – Ultra performance liquid chromatography, modern technique in liquid chromatography.</

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44

Bertuzzi, Terenzio, Silvia Rastelli, Annalisa Mulazzi, and Amedeo Pietri. "LC-MS/MS and LC-UV Determination of Moniliformin by Adding Lanthanide Ions to the Mobile Phase." Toxins 11, no. 10 (2019): 570. http://dx.doi.org/10.3390/toxins11100570.

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An innovative chromatographic analysis was developed for the determination of moniliformin (MON). Because of its ionic nature, MON is weakly retained in reversed-phase chromatography and the separation may be tricky. Nevertheless, this technique is normally used either with the formation of ion pairs or employing specific RP columns for polar compounds, or combining anion exchange and hydrophobic interactions. Hydrophilic interaction chromatography (HILIC) was also used, but a non-negligible peak tailing was observed. Besides its ionic nature, MON is a di-ketone and di-ketones, mainly β-di-ket

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45

Cong, Jing Xiang, Shao Yan Wang, and Hong Gao. "Separation of Liquiritin by Two-Dimensional Liquid Chromatography." Advanced Materials Research 455-456 (January 2012): 1232–38. http://dx.doi.org/10.4028/www.scientific.net/amr.455-456.1232.

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Two-dimensional liquid chromatography (2DLC) is an important technology for the separation and analysis of complex samples. Liquiritin, an important active component in licorice, was chosen as the target compound and it was separated by three kinds of off-line 2DLC, i.e. size exclusion chromatography × reversed phase chromatography, normal phase × reversed phase chromatography and reversed phase chromatography × reversed phase chromatography (SEC×RP, NP×RP and RP×RP). The chromatographic conditions were selected and the 2D systems were combined. The results show that it is feasible to separate

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46

Yang, Yiwen, Yehui Wang, Zongbi Bao, Qiwei Yang, Zhiguo Zhang та Qilong Ren. "Progress in the Enantioseparation of β-Blockers by Chromatographic Methods". Molecules 26, № 2 (2021): 468. http://dx.doi.org/10.3390/molecules26020468.

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β-adrenergic antagonists (β-blockers) with at least one chiral center are an exceedingly important class of drugs used mostly to treat cardiovascular diseases. At least 70 β-blockers have been investigated in history. However, only a few β-blockers, e.g., timolol, are clinically marketed as an optically pure enantiomer. Therefore, the separation of racemates of β-blockers is essential both in the laboratory and industry. Many approaches have been explored to obtain the single enantiomeric β-blocker, including high performance liquid chromatography, supercritical fluid chromatography and simula

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47

Edwards, Judson V., and Eivind B. Lillehoj. "Isolation and Liquid Chromatographic Determination of the Cyclic Peptide Mycotoxin Cyclosporin A from Rice." Journal of AOAC INTERNATIONAL 70, no. 1 (1987): 126–29. http://dx.doi.org/10.1093/jaoac/70.1.126.

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Abstract A simple method for determination and quantitation of a cyclic peptide mycotoxin, cyclosporin A, in rice is presented. Rice inoculated with Trichoderma polysporum (Link ex Pers.) was extracted with methylene chloride after 4 weeks of incubation. Cyclosporin A was isolated from extracts by using open bed gel filtration column chromatography (LH-20, acetonitrile) and monitored with thin layer chromatography and reverse phase liquid chromatography coelution with a standard. Preliminary thin layer chromatographic methods were developed. Cyclosporin A was detected by iodine and after parti

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48

Tarter, J. G., and P. J. Worsfold. "Ion chromatography (chromatographic science series, vol. 37)." Analytica Chimica Acta 207 (1988): 381. http://dx.doi.org/10.1016/s0003-2670(00)80823-5.

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49

Helfferich, FriedrichG. "Complexation chromatography (Chromatographic Science Series, Vol. 57)." Journal of Chromatography A 626, no. 2 (1992): 317–18. http://dx.doi.org/10.1016/0021-9673(92)85429-w.

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50

Naida, O. O., B. A. Rudenko, R. Kh Khamizov, and M. A. Kumakhov. "Polycapillary (multichannel) chromatographic columns in liquid chromatography." Journal of Analytical Chemistry 64, no. 7 (2009): 721–24. http://dx.doi.org/10.1134/s1061934809070107.

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