Relevant bibliographies by topics / Acetonitrile-water binary system

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Academic literature on the topic 'Acetonitrile-water binary system'

Author: Grafiati
Published: 3 June 2025
Last updated: 31 July 2025

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Journal articles on the topic "Acetonitrile-water binary system"

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Nowakowska, Joanna, Piotr Pikul, Krzesimir Ciura, and Jakub Piotrowicz. "A simple TLC and HPTLC method for separation of selected steroid drugs." Open Chemistry 11, no. 8 (2013): 1297–308. http://dx.doi.org/10.2478/s11532-013-0258-8.

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AbstractChromatographic properties of five steroid drugs: cortisone, hydrocortisone, methylprednisolone, prednisolone and norgestrel have been studied by normal-, reversed-phase and hydrophilic neutral cyano-bonded silica stationary phase with five binary mobile phases (acetonitrile-water, acetonitrile-DMSO, acetonitrile-methanol, acetone-petroleum ether, acetone-water) in which the concentration of organic modifier was varied from 0 to 100% (v/v). This study reports the optimization of steroid hormones separation. Chromatographic retention data and possible retention mechanisms are discussed.
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Baranović, Goran. "Refractive Index Mixing Rules and Excess Infrared Spectra of Binary Mixtures." Applied Spectroscopy 71, no. 5 (2016): 1039–49. http://dx.doi.org/10.1177/0003702816668532.

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Three refractive index mixing rules, Arago–Biot, Lorentz–Lorenz, and Newton, are generalized to complex refractive index and used to define infrared (IR) spectra of the corresponding ideal liquid mixtures. Using the measured optical constants n and k for acetonitrile-water mixtures (Bertie and Lan, 1997) the excess absorbances, AE = Aobs − Aideal, are calculated. Relying upon the well-established properties of the acetonitrile–water mixtures, the interpretation of the excess absorbances is established that is essentially based on the understanding of a liquid as a set of oscillators. The set d
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Goronja, Jelena, Aleksandra Janosevic-Lezaic, Biljana Dimitrijevic, Andjelija Malenovic, Dragomir Stanisavljev, and Natasa Pejic. "Determination of critical micelle concentration of cetyltrimethylammonium bromide: Different procedures for analysis of experimental data." Chemical Industry 70, no. 4 (2016): 485–92. http://dx.doi.org/10.2298/hemind150622055g.

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Conductivity of two micellar systems was measured in order to determine critical micelle concentration (CMC) of cetyltrimethylammonium bromide (CTAB). Those systems were: CTin water and CTin binary mixture acetonitrile (ACN)-water. Conductivity (?)-concentration (c) data were treated by four different methods: conventional method, differential methods (first and second derivative) and method of integration (methods A-D, respectively). As CTin water micellar system shows a sharp transition between premicellar and postmicellar part of the ?/c curve, any of the applied methods gives reliable CMC
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Pauletti, Michela, Vladimir V. Rybkin, and Marcella Iannuzzi. "Surface tension of liquids and binary mixtures from molecular dynamics simulations." Journal of Physics: Condensed Matter 34, no. 4 (2021): 044003. http://dx.doi.org/10.1088/1361-648x/ac2e8f.

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Abstract In this work we assess and extend strategies for calculating surface tension of complex liquids from molecular dynamics simulations: the mechanical route and the instantaneous liquid interface (ILI) approach. The former employs the connection between stress tensor and surface tension, whereas the latter involves computation of instantaneous density field. Whereas the mechanical route is general, the ILI method involves system-dependent parameters restricting its original application to liquid water only. Here we generalize the approach to complex molecular liquids using atomic van der
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Kovačević, Strahinja, Milica Karadžić Banjac, Jasmina Anojčić, et al. "Comparative Analysis of Anisotropic Lipophilicity of a Series of 6-Chloro-1,3,5-Triazines Determined in Reversed Phase Ultra High Performance Liquid Chromatography System." Agriculture 13, no. 12 (2023): 2212. http://dx.doi.org/10.3390/agriculture13122212.

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Triazine derivatives are well-known commercially available compounds used for selective weed control in different crops, such as corn and sugarcane. Some of them are considered persistent organic compounds in the environment and it is important to improve the features of herbicide formulae, to estimate their physicochemical properties and to determine their retention behavior in modern analytical techniques that can be used in the determination of pesticides in environmental samples. The present study deals with a comprehensive analysis of the chromatographic behavior of a series of 6-chloro-1
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Vláčil, František, and Věra Hamplová. "A contribution to the description of the retention mechanism of metal chelates during their reversed-phase chromatography." Collection of Czechoslovak Chemical Communications 50, no. 10 (1985): 2221–27. http://dx.doi.org/10.1135/cccc19852221.

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Mercury(II) diethyldithiocarbamate was chromatographed on silica gel with chemically bonded octadecyl groups using aqueous mixtures with methanol, acetonitrile, dioxane, and tetrahydrofuran, respectively, as the mobile phase, and the dependence of logarithm of the capacity ratio (k) on the volume fraction of water in the binary mobile phase was examined. Also, the dependence of k on the liquid-liquid extraction distribution ratio in an aqueous methanol-n-alkane extraction system was investigated for Cu, Co, Ni, Pb, and Hg diethyldithiocarbamates. Both kinds of dependence are linear, which sugg
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Ryzhkin, Dmitry A., and Valentina M. Raeva. "ANALYSIS OF ENERGY CONSUMPTION OF EXTRACTIVE DISTILLATION FLOWSHEETS OF FOUR-COMPONENT SOLVENT MIXTURE." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 64, no. 6 (2021): 47–55. http://dx.doi.org/10.6060/ivkkt.20216406.6326.

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A comparative analysis of energy consumption for extractive distillation flowsheets was carried out. This was done by the example of methanol - ethanol - acetonitrile - mixture. These solvents are used in pharmaceutical industries. The basic system methanol - ethanol - acetonitrile - water contains four binary and one ternary minimum-boiling azeotropes. Pressure change has almost no effect on the location of separatric surfaces. Therefore, extractive distillation should be used to separate solvents mixtures of any composition. Industrial entrainers dimethyl sulfoxide and glycerol are considere
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Ciura, Krzesimir, Joanna Nowakowska, Piotr Pikul, Wiktoria Struck-Lewicka, and Michał J. Markuszewski. "A Comparative Quantitative Structure-Retention Relationships Study for Lipophilicity Determination of Compounds with a Phenanthrene Skeleton on Cyano-, Reversed Phase-, and Normal Phase-Thin Layer Chromatography Stationary Phases." Journal of AOAC INTERNATIONAL 98, no. 2 (2015): 345–53. http://dx.doi.org/10.5740/jaoacint.14-187.

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Abstract The phenanthrene skeleton is an important moiety in medical chemistry as it is present in steroidal drugs used as anti-inflammatory and anti-asthmatic agents as well as synthetic hormones or potassium sparing diuretics. Chromatographic properties of 14 derivatives containing the phenanthrene skeleton in their structure with known lipophilicityhave been studied. NP, RP, and cyano-bonded silica stationary phaseswith three binary mobile phases (acetonitrile–water, acetone–water, and acetone–petroleum ether) were tested. Obtained chromatographic data were correlated with the lipophilicity
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Szabó, Zoltán-István, Ágnes Bartalis-Fábián, and Gergő Tóth. "Simultaneous Determination of Escitalopram Impurities including the R-enantiomer on a Cellulose tris(3,5-Dimethylphenylcarbamate)-Based Chiral Column in Reversed-Phase Mode." Molecules 27, no. 24 (2022): 9022. http://dx.doi.org/10.3390/molecules27249022.

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A high-performance liquid chromatographic method was developed for the simultaneous determination of the related substances—three potential synthesis-related chemical impurities and the distomer—of escitalopram. The separation capacity of seven different polysaccharide-type chiral columns, including three amylose-based (Lux Amylose-1, Lux i-Amylose-1, Lux Amylose-2) and four cellulose-based columns (Lux Cellulose-1, Lux Cellulose-2, Lux Cellulose-3, and Lux Cellulose-4) were screened in the polar organic and reversed-phase modes. Lux Cellulose-1, based on cellulose tris(3,5-dimethylphenylcarba
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Wu, Nannan, Shunli Ouyang, Junjie Cui, et al. "Investigation on the Influence of Microstructure Based on Hydrogen Bonding on Surface Tension by Raman Spectroscopy." International Journal of Analytical Chemistry 2019 (December 29, 2019): 1–7. http://dx.doi.org/10.1155/2019/7975237.

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Surface tension (http://mts.hindawi.com/update/) in our Manuscript Tracking System and after you have logged in click on the ORCID link at the top of the page. This link will take you to the ORCID website where you will be able to create an account for yourself. Once you have done so, your new ORCID will be saved in our Manuscript Tracking System automatically."?>and Raman spectra containing hydrogen bonding in acetonitrile aqueous solutions with different mole ratios were obtained. Varied surface tension and hydrogen bonding in the mixed solution were discussed. For this purpose, the OH st
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Conference papers on the topic "Acetonitrile-water binary system"

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Stanić, Petar B., Biljana Šmit, Jovana Muškinja, et al. "Normal and Reversed Phases Thin-Layer Chromatography of Arylidene 2- Thiohydantoin Derivatives." In 2nd International Conference on Chemo and Bioinformatics. Institute for Information Technologies, University of Kragujevac, 2023. http://dx.doi.org/10.46793/iccbi23.531s.

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In this paper, the retention behavior of thirteen newly synthesized arylidene derivatives of 2-hydamthione was investigated by normal and reversed phases thin-layer chromatography. In normal phase chromatography, thin layers of silica gel and cyano-propyl (CN) silica gel with fluorescent indicator F254 were used as the stationary phase. As the mobile phase, binary systems of non-aqueous solvents benzene-ethyl acetate and hexane-ethyl acetate were used, 8:2 (v/v). Reversed phase chromatography was performed using a thin layer of octadecyl (C-18) silica gel with fluorescent indicator F254 as the
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