Results 61 to 70 of about 31,758 (223)

RECENT ADVANCES IN GAS, LIQUID AND SUPERCRITICAL FLUID CHROMATOGRAPHY IN THE CONTEXT OF SUSTAINABLE/ GREEN CHEMISTRY

International Journal of Pharmacy & Integrated Health Sciences
Background: Chromatographic techniques such as gas chromatography (GC), liquid chromatography (LC) and supercritical fluid chromatography (SFC) have long been employed in analytical chemistry. However, using or producing certain organic solvents and non-
Nimra Sohail, Bushra Naureen, Mehmood Asghar, Aziza Sarwar, Aisha Altaf   +4 more
doaj   +1 more source

Enantioselective Analytical- and Preparative-Scale Separation of Hexabromocyclododecane Stereoisomers Using Packed Column Supercritical Fluid Chromatography

Molecules, 2016
Hexabromocyclododecane (HBCDD) is an additive brominated flame retardant which has been listed in Annex A of the Stockholm Convention for elimination of production and use.
Nicole Riddell, Lauren Gayle Mullin, Bert van Bavel, Ingrid Ericson Jogsten, Alan McAlees, Allison Brazeau, Scott Synnott, Alan Lough, Robert McCrindle, Brock Chittim   +9 more
doaj   +1 more source

The need to merge supercritical fluid chromatography into undergraduate curricula for the twenty-first century

Green Chemistry Letters and Reviews, 2021
Complementarity to liquid and gas chromatography, supercritical fluid chromatography (SFC) is becoming a mainstream separation technique. There is a global demand for more SFC users since ‘green’ method development has become a favorable target for ...
Tricia Naicker, Kamini Govender
doaj   +1 more source

Chemical Ionization Mass Spectrometry: Fundamental Principles, Diverse Applications, and the Latest Technological Frontiers

Mass Spectrometry Reviews, EarlyView.
ABSTRACT The review examines the evolution of chemical ionization mass spectrometry (CI‐MS), a technique developed in 1966 by Field and Munson. CI is a soft‐ionization method that produces more intense molecular ions with less fragmentation than electron ionization (EI).
Malvika Dutt, Adriana Arigò, Giorgio Famiglini, Pierangela Palma, Achille Cappiello   +4 more
wiley   +1 more source

Supercritical fluid chromatography and scale up study

Acta Chimica Slovenica, 2014
The influence of process parameters on supercritical fluid chromatography (SFC) and scale-up on to the preparative scale was investigated. In this scope, dependency of pressure, temperature, type and concentration of modifier, and type of stationary ...
Miha Oman, Petra Kotnik, Mojca Škerget, Željko Knez   +3 more
doaj  

Supercritical CO2 Extracts and Volatile Oil of Basil (Ocimum basilicum L.) Comparison with Conventional Methods

Separations, 2018
Interest in new products from aromatic plants as medical and nutritional compounds is increasing. The aim of this work was to apply different extraction methods, including the use of supercritical carbon dioxide extraction, and to test the antioxidant ...
José Coelho, Jerson Veiga, Amin Karmali, Marisa Nicolai, Catarina Pinto Reis, Beatriz Nobre, António Palavra   +6 more
doaj   +1 more source

Supercritical fluid extraction as a clean-up method for the extraction of pesticides from wool wax. A preliminary approach [PDF]

, 2007
Este trabajo es un estudio preliminar para el desarrollo de un metodo de extraccion de pesticidas directamente de las muestras de cera mediante extraccion con fluido supercritico. La novedad del estudio consiste en la extraccion directa de los pesticidas
Carrillo, Fernando, Christoe, J., Crespi, Martí, Gutiérrez Bouzán, Carmen, López Mesas, Montserrat   +4 more
core   +3 more sources

Comprehensive Insights into Natural Bioactive Compounds: From Chemical Diversity and Mechanisms to Biotechnological Innovations and Applications

ChemistryOpen, EarlyView.
Natural products derived from plants, animals, fungi, bacteria, and minerals contain diverse bioactive classes such as alkaloids, flavonoids, terpenoids, saponins, tannins, and phenolics. These natural products work through different mechanisms, including ROS inhibition, NF‐κB suppression, and cytokine regulation, and exhibit wide applications across ...
Sajid Ali, Atif Ali Khan Khalil, Muhammad Saeed Akhtar, Adnan Amin, Wajid Zaman   +4 more
wiley   +1 more source

Essential Oils from Humulus Lupulus scCO₂ Extract by Hydrodistillation and Microwave-Assisted Hydrodistillation

Molecules, 2018
Two different extraction methods were used for a comparative study of essential oils obtained from the Humulus lupulus scCO2 (sc-supercritical) extract: microwave-assisted hydrodistillation (MAHD) and conventional hydrodistillation (HD). As a result, the
Katarzyna Tyśkiewicz, Roman Gieysztor, Marcin Konkol, Jan Szałas, Edward Rój   +4 more
doaj   +1 more source

In‐Process Melt Separation of Depolymerized PET in PET/PE Blends for Upcycling via Twin‐Screw Extrusion

Polymer Engineering &Science, EarlyView.
This work aims to depolymerize PET in PET/LLDPE blends via twin‐screw extrusion to allow low‐Mw PET to be extracted and separated. The separated PET is made into BHET and then sold to create virgin PET. LLDPE will be cracked into low‐Mw products that can be utilized as various products.
Vecchi Steven, Ghassemi Hossein, Schiraldi David, Maia João   +3 more
wiley   +1 more source