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Relevant bibliographies by topics / Octadecylsilica stationary phases

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Academic literature on the topic 'Octadecylsilica stationary phases'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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Journal articles on the topic "Octadecylsilica stationary phases"

1

Jinno, K., J. Wu, M. Ichikawa, and I. Takata. "Characterization of octadecylsilica stationary phases by spectroscopic methods." Chromatographia 37, no. 11-12 (December 1993): 627–34. http://dx.doi.org/10.1007/bf02274114.

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2

Jinno, K., and Y. Lin. "Separation of carotenoids by high-performance liquid chromatography with polymeric and monomeric octadecylsilica stationary phases." Chromatographia 41, no. 5-6 (September 1995): 311–17. http://dx.doi.org/10.1007/bf02688045.

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3

Jinno, Kiyokatsu, Shigeru Shimura, John C. Fetzer, and Wilton R. Biggs. "A Comparison of Dicoronylene and Octadecylsilica Stationary Phases for Separation of Polycyclic Aromatic Hydrocarbons by Microcolumn Liquid Chromatography." Polycyclic Aromatic Compounds 1, no. 3 (April 1990): 151–59. http://dx.doi.org/10.1080/10406639008034758.

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4

Jinno, K., S. Shimura, N. Tanaka, K. Kimata, J. C. Fetzer, and W. R. Biggs. "Planarity recognition of large polycyclic aromatic hydrocarbons by various octadecylsilica stationary phases in non-aqueous reversed-phase liquid chromatography." Chromatographia 27, no. 7-8 (April 1989): 285–91. http://dx.doi.org/10.1007/bf02321270.

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5

Zarzycki, Paweł K., Kathrin M. Kulhanek, and Roger Smith. "Chromatographic behaviour of selected steroids and their inclusion complexes with β-cyclodextrin on octadecylsilica stationary phases with different carbon loads." Journal of Chromatography A 955, no. 1 (April 2002): 71–78. http://dx.doi.org/10.1016/s0021-9673(02)00196-6.

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6

Hu, Wenzhi, and Paul R. Haddad. "Retention and selectivity effects of coating octadecylsilica stationary phases with low molecular weight alcohols in reversed-phase liquid chromatography using water as mobile phase." Analytical Communications 35, no. 2 (1998): 49–52. http://dx.doi.org/10.1039/a708092a.

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7

Iyire, Affiong, Craig Russell, Tom Dennison, Rajith Rajoli, Imran Saleem, Ayesha Rahman, and Afzal Mohammed. "Development, Optimisation, Validation and Inter-Laboratory Verification of a Reversed Phase HPLC Method for Quantification of Human Recombinant Insulin." JOURNAL OF ADVANCES IN BIOTECHNOLOGY 7, no. 1 (March 27, 2018): 984–98. http://dx.doi.org/10.24297/jbt.v7i1.7192.

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Abstract:

HPLC methods for insulin in official monographs require extended runtimes and elevated temperatures. Inter-laboratory reproducibility of HPLC methods obtained from published literature is an on-going challenge, moreso for peptides. This paper serves as a step-by step guide to troubleshoot and establish a validated HPLC method for insulin at room temperature using simple UV detectors with minimal run times. A modified gradient reversed-phase HPLC was developed for the quantification of recombinant human insulin with UV detection at room temperature. An octadecylsilica column was used as the stationary phase while the mobile phase consisted of solution A: 1mmol sodium sulphate and 0.2% triethylamine in water and solution B: acetonitrile. The developed method was then validated using International Conference on Harmonisation (ICH) guidelines. The calibration curve was linear over a concentration range of 10-1000 µg/mL with correlation coefficient of 0.9993, with average recovery percent of 100.89 ± 1.4% and RSD recovery of 0.01. Insulin retention time was 3.84 ± 0.08 mins, while LOD and LOQ were estimated at 0.63 and 2.0 µg/mL respectively. The developed method conformed to the validation criteria of the ICH guidelines in our laboratories and other independent operator laboratories, and can serve as a rapid and effective method for quantifying insulin from any sample at room temperature using simple detectors.

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Dissertations / Theses on the topic "Octadecylsilica stationary phases"

1

Kočí, Kamila. "Separace azaarénů vysoceúčinnou kapalinovou chromatografií." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2008. http://www.nusl.cz/ntk/nusl-233281.

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Abstract:

Under the framework of this PhD project, a study on chromatographic behaviour of selected azaarenes on octadecylsilica stationary phases during their separation by reversed phase liquid chromatography was developed. The main goal was aimed at an application of the basic RPLC principles on the retention behaviour of azaarenes including the effects such as peak tailing, peak broadening, irreproducible retention or strong retention on a stationary phase. This study was particularly focused on basic azaarenes, also called acridines, which belong to a group of persistent organic pollutants providing mutagenic and/or carcinogenic activity. The retention patterns were studied on a group of eight acridines that are often present in environmental samples polluted with polycyclic aromatic compounds. The mixture of acridines was separated under isocratic elution conditions on three octadecylsilica stationary phases using two different binary mixtures as a mobile phase. Evaluation of the surface properties of the selected stationary phases was firstly performed, followed by the separation experiments. The structure of the experiments was designed to evaluate the effect of three different factors on the retention behaviour of acridines: properties of a stationary phase, composition of a mobile phase and physical-chemical properties of acridines. The treatment of the results was based on the capacity factor values providing the best fitting and repeatability of data, but other parameters that evaluate thermodynamic and kinetic aspects of the separation process were also given. Simple correlations between the three factors and a character of retention mechanism of acridines on the given separation system were found. Application of this knowledge simplifies an optimisation process and helps to solve common separation problems for acridines, but also for other basic analytes displaying similar physical-chemical properties (Mr and pKa).

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