Article
Chemistry, Analytical
Ernest Darko, Kevin B. Thurbide
Summary: Sulfolane was explored as a novel stationary phase for analytical separations by gas chromatography with flame ionization detection (GC-FID). Stainless steel capillaries were found to be a good substrate for coating and retaining the sulfolane phase. The phase exhibited stability for several hours when using elevated carrier gas pressures and small restriction tubing at the outlet. The sulfolane phase demonstrated good retention and peak shape for various analytes and showed improved selectivity compared to longer conventional GC columns. The method was successfully applied to the analysis of aromatics in gasoline headspace, suggesting the potential usefulness of sulfolane as a stationary phase in GC separations.
ANALYTICA CHIMICA ACTA
(2022)
Article
Chemistry, Multidisciplinary
Ruonan Chen, Zhiqiang Cai, Qiuchen Huang, Wei Zhang, Keyun Jin, Yi Zhao, Yiwen Li, Tao Sun, Hongying Ji, Shuai Li
Summary: A novel star-shaped copolymer functionalized by benzimidazolium ionic liquid was synthesized and used as a stationary phase in capillary gas chromatography. The stationary phase exhibited high column efficiency and moderate polarity, providing good separation performance for hydrogen-bonded and aromatic analytes, as well as isomer mixtures of halogenated benzene, nitrobenzene, phenol, and benzaldehydes.
Article
Biochemical Research Methods
Azam Gholizadeh, Mustahsin Chowdhury, Masoud Agah
Summary: This study investigates the impact of stationary phase coating on the separation efficiency of gas chromatography microcolumns, finding that higher temperature treatment can improve efficiency but may reduce peak symmetry, with the thermally treated stationary phase at 240 degrees Celsius demonstrating significantly higher efficiency and resolution.
JOURNAL OF CHROMATOGRAPHY A
(2021)
Article
Biochemical Research Methods
Boxin Chen, Fei Feng, Yangyang Zhao, Qiyong Liu, Bin Zhao, Lei Li, Haimei Zhou, Xinxin Li
Summary: A new type of semi-packed column, SC -HECP, with high-density elliptic cylindrical posts was reported in this paper, showing improvements in surface area and aspect ratio compared to the traditional SC -CP. Experimental results demonstrated better separation performance in SC -HECP due to the increase in surface area and aspect ratio, leading to a significant increase in theoretical plates and decrease in tailing factor for nonane.
JOURNAL OF CHROMATOGRAPHY A
(2022)
Article
Chemistry, Analytical
Sepideh Khaki Firooz, M. Farooq Wahab, Jeongjae Yu, Daniel W. Armstrong
Summary: Packed column SFC is popular for separations due to low CO2 cost and environmental benefits. New functionalized cyclofructan columns show improved selectivity and efficiency in achiral SFC separations. Adding small amounts of water to the methanol modifier in CO2 improves peak symmetries for amines. These new stationary phases offer greener approaches to separation problems.
Article
Chemistry, Multidisciplinary
Yuan Yan, Zhenzhong Wang, Zitong Zhang, Zhen He, Lun Luo, Jing Fan
Summary: Tetraphenyl porphyrin (TPP) shows great potential as a gas chromatography stationary phase, with high efficiency, superior retention, and good resolution properties. The TPP column exhibits excellent thermal stability and precision, making it suitable for the analysis of compounds like polychlorinated biphenyls.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Analytical
Edvaldo V. S. Maciel, Joao V. B. Borsatto, Karen Mejia-Carmona, Fernando M. Lancas
Summary: Graphene oxide-based LC stationary phases were developed for separating hormones from urine using capillaryLC-MS/MS. Two stationary phases with different particle diameters (5μm and 10μm) were produced, and the 10μm phase showed better performance. The SiGO-C18 capillary column successfully separated hormones in urine.
ANALYTICA CHIMICA ACTA
(2023)
Review
Chemistry, Analytical
Rustem Kecili, Fatemeh Ghorbani-Bidkorbeh, Ibrahim Dolak, Gurbet Canpolat, Muharrem Karabork, Chaudhery Mustansar Hussain
Summary: This paper introduces the superior features of nanomaterials, especially magnetic nanoparticles, and highlights the latest progress and applications in their development for extraction and chromatographic applications.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Martin Gilar, Kenneth D. Berthelette, Thomas H. Walter
Summary: By comparing 19 different hydrophilic interaction chromatography columns, it was found that the selectivity differences strongly depended on ionic interactions. Columns with neutral stationary phases showed more similar selectivity compared to those with cation or anion exchange activity. Zwitterionic columns exhibited some degree of cation or anion exchange activity, but to a lesser extent than silica and amine-containing phases.
JOURNAL OF SEPARATION SCIENCE
(2022)
Article
Chemistry, Analytical
Thomas H. Walter, Bonnie A. Alden, Kenneth Berthelette, Jessica A. Field, Nicole L. Lawrence, Justin McLaughlin, Amit Patel
Summary: A sulfobetaine stationary phase based on 1.7 μm ethylene-bridged hybrid organic-inorganic particles was characterized for hydrophilic interaction chromatography, showing strong retention for polar neutrals and high selectivity for specific functional groups. The acid and base stability of this stationary phase was tested at extreme pH levels, supporting a recommended pH range of 2-10. Columns packed with this material showed greatly improved peak shapes for metal-sensitive analytes when compared to conventional stainless steel hardware.
JOURNAL OF SEPARATION SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Yongrui He, Tiantian Shi, Meiling Qi
Summary: This work introduces a novel strategy to engineer a GC stationary phase with high selectivity, inertness, and thermal stability by introducing 3D pi-rich TP moieties to a polar chain polymer. The new TP-terminated polycaprolactone polymer (TPP) showed significantly improved inertness towards fatty acids and aldehydes, and enhanced thermal stability compared to traditional PCL columns. The proposed strategy is facile, feasible, and generally applicable to similar polymers.
CHINESE CHEMICAL LETTERS
(2021)
Article
Biochemical Research Methods
Bo Tang, Xin Zhang, Lina Geng, Liquan Sun, Aiqin Luo
Summary: Chiral metal-organic cages (MOCs) have been investigated as a novel stationary phase for gas chromatography (GC) due to their unique molecular recognition ability. The chiral MOC-PA exhibited high-resolution performance for a wide range of analytes, especially for amino acid derivatives, showing excellent separation repeatability and reproducibility. The experimental results suggest that MOC-PA has great potential as a GC stationary phase.
JOURNAL OF CHROMATOGRAPHY A
(2021)
Article
Chemistry, Multidisciplinary
Yali Yang, Juanjuan Wang, Ruirui Liu, Kaijun Quan, Jia Chen, Xiuhui Liu, Hongdeng Qiu
Summary: Surface modification of materials is an effective technique to enhance their properties. In this study, Tetraphenylethylene (TPE) was successfully grafted onto silica surface to form Sil-TPE, which exhibited aggregation-induced emission (AIE) and superhydrophobic properties. Sil-TPE also showed excellent separation performance in liquid chromatography, making it a promising stationary phase material.
Article
Mechanics
Carlos D. Luzi, Osvaldo M. Martinez, Guillermo F. Barreto
Summary: The influence of radial velocity profiles on trans-column dispersion in a packed bed during single-phase flow was investigated. The magnitude of the dispersive effect was evaluated for a long bed, and the results showed satisfactory agreement. It was found that the trans-column dispersion coefficient is affected by the vessel-to-particle diameter ratio.
Article
Chemistry, Analytical
Yuan Huan, Du Xiao-Song, Xu Ming, Zhang Chuan-Wu, Chen Xiang-Dong
Summary: A 200-cm-long, 300 μm-depth and 80 μm-wide gas chromatographic column was fabricated on a silicon chip using MEMS technique. The semi-packed GC column achieved even flow velocity and improved flow uniformity at zones between bends, with a more nonsymmetric distribution at the bends. Benzene and toluene were separated within 1.5 min, and the column achieved a plate number of 4790 plates/m for N-alkane components.
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Michela Sturini, Federica Maraschi, Alice Cantalupi, Luca Pretali, Stefania Nicolis, Daniele Dondi, Antonella Profumo, Valentina Caratto, Elisa Sanguineti, Maurizio Ferretti, Angelo Albini
Article
Energy & Fuels
Silvia Bolognesi, Giorgia Bernardi, Arianna Callegari, Daniele Dondi, Andrea G. Capodaglio
Summary: Transforming sewage sludge into biochar is a sustainable resource recovery process that addresses issues in wastewater-based circular economy, while combined activated sludge-microalgae systems can remove both carbon and nutrients from wastewater simultaneously, but may pose challenges in solid residue disposal practices.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Materials Science, Paper & Wood
C. Girometta, D. Dondi, R. M. Baiguera, F. Bracco, D. S. Branciforti, S. Buratti, S. Lazzaroni, E. Savino
Editorial Material
Chemistry, Physical
Daniele Dondi, Dhanalakshmi Vadivel
Editorial Material
Chemistry, Physical
Antonella Profumo, Andrea Speltini
Article
Biochemistry & Molecular Biology
Andrea Speltini, Francesca Merlo, Federica Maraschi, Giorgio Marrubini, Anna Faravelli, Antonella Profumo
Summary: Magn-Humic, a micron-sized sorbent prepared by pyrolysis of humic acids onto silica-coated magnetite, was successfully applied for simultaneous magnetic solid-phase extraction of glucocorticoids, estrogens, progestogens, and androgens from human plasma. The method achieved quantitative recovery with satisfactory clean-up, demonstrating high selectivity, sensitivity, and low detection limits in the ng mL(-1) range.
Article
Microbiology
Marco Cartabia, Carolina Elena Girometta, Chiara Milanese, Rebecca Michela Baiguera, Simone Buratti, Diego Savio Branciforti, Dhanalakshmi Vadivel, Alessandro Girella, Stefano Babbini, Elena Savino, Daniele Dondi
Summary: Wood decay fungi are ideal for developing myco-materials due to their mycelial texture, ease of cultivation, and lack of sporification. This study focused on developing leather-like mycelium mats using 21 selected WDF strains, analyzing the principal components and texture through TGA and SEM. The results suggest that the Fomitopsis iberica strain is the most suitable for leather-like materials development.
Article
Chemistry, Physical
Dhanalakshmi Vadivel, Michela Sturini, Andrea Speltini, Daniele Dondi
Summary: Bismuth tungstate and Tetrabutylammonium decatungstate are two synthesized tungsten catalysts of interest. Bismuth tungstate is used as a photo-catalyst for the degradation of ofloxacin antibiotic under simulated solar light. Tetrabutylammonium decatungstate is used as a catalyst for hydrogen production from glucose and 2-propanol in aqueous solution.
Article
Biochemistry & Molecular Biology
Francesca Merlo, Dario Centenaro, Federica Maraschi, Antonella Profumo, Andrea Speltini
Summary: This work developed a simple, quick, and efficient analytical method for determining fluoroquinolone antimicrobial residues in vegetables. The method involved ultrasound-assisted extraction and HPLC-MS/MS analysis, with no need for organic solvents. The method was validated and showed high recovery rates and precision. The method was successfully applied for monitoring fluoroquinolone residues in vegetables from supermarkets.
Article
Chemistry, Multidisciplinary
Maria Medina-Llamas, Andrea Speltini, Antonella Profumo, Francesca Panzarea, Antonella Milella, Francesco Fracassi, Andrea Listorti, Lorenzo Malavasi
Summary: In this work, Cs3Bi2Br9 nanocrystals obtained by wet ball milling synthesis were coupled with g-C3N4 nanosheets produced by thermal oxidation of bulk g-C3N4 to form heterojunctions. These heterojunctions were characterized and tested for the photocatalytic hydrogen evolution reaction, and showed a significant improvement in H2 production compared to pristine carbon nitride. This study aims to provide insights into the synthesis of inexpensive and high-performing heterojunctions using metal halide perovskites for photocatalytic applications.
Article
Biochemistry & Molecular Biology
Sara Perteghella, Alice Garzoni, Alessandro Invernizzi, Milena Sorrenti, Cinzia Boselli, Antonia Icaro Cornaglia, Daniele Dondi, Simone Lazzaroni, Giorgio Marrubini, Carla Caramella, Laura Catenacci, Maria Cristina Bonferoni
Summary: Clove oil is a powerful antioxidant essential oil with various beneficial properties. Chitosan oleate was used to stabilize the clove oil nanoemulsion, which showed good stability and antioxidant effects in vitro and in a murine burn model.
Article
Energy & Fuels
Lucia Cattani, Paolo Cattani, Anna Magrini, Roberto Figoni, Daniele Dondi, Dhanalakshmi Vadivel
Summary: This research investigates the suitability of air-to-water generator (AWG) technology in addressing water supply concerns in green hydrogen production. The study focuses on water quality and energy sustainability issues, and provides experimental evidence supporting the effectiveness of AWG in electrolysis processes. A case study demonstrates the energy sustainability of AWG in an electrolyzer plant, highlighting its potential as a solution for water scarcity and improved sustainability in green hydrogen production.
Article
Mathematics, Interdisciplinary Applications
Daniele Dondi, Cristina D. Lopez Robles, Anna Magrini, Marco Cartesegna
Summary: Modern fuel boilers recover both heat and latent heat of condensation from water vapor in the warm fumes. Different amounts of steam are produced depending on fuel composition, affecting heat production. Biomass combustion generates more water vapor, usable for liquid water production.
Article
Chemistry, Physical
Andrea Speltini, Lidia Romani, Daniele Dondi, Lorenzo Malavasi, Antonella Profumo