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Efficacy of Redox-Active Cu(II) Dipyrrin Complexes toward Electrochemical Reduction of CO.
Inorg Chem
March 2025
Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India.
New D-A-type catalysts based on Cu (II) complexes ( and ) including dipyrrin ligands with phenothiazine/carbazole as the -substituent have been described. The complexes have been thoroughly characterized by various methods (H, C, ESI-MS, EPR, and UV-vis studies), and structures of both and unequivocally determined by X-ray single crystal analyses. The catalysts and are stable at room temperature and exhibit Faradaic efficiency values of ∼56% () and ∼46% () toward homogeneous reduction of CO to CO.
View Article and Find Full Text PDFAutomated Sequential Derivatization for Gas Chromatography-[Orbitrap] Mass Spectrometry-based Metabolite Profiling of Human Blood-based Samples.
Bio Protoc
March 2025
RECETOX, Faculty of Science, Masaryk University, Kotlarska 2, Brno, Czech Republic.
Many small molecules require derivatization to increase their volatility and to be amenable to gas chromatographic (GC) separation. Derivatization is usually time-consuming, and typical batch-wise procedures increase sample variability. Sequential automation of derivatization via robotic liquid handling enables the overlapping of sample preparation and analysis, maximizing time efficiency and minimizing variability.
View Article and Find Full Text PDFThe Effectiveness of Liquid-Phase Microextraction of Beta-Blockers from Aqueous Matrices for Their Analysis by Chromatographic Techniques.
Molecules
February 2025
"Raluca Ripan" Institute for Research in Chemistry, Babeş-Bolyai University, 30 Fântânele Str., RO-400294 Cluj-Napoca, Romania.
Beta-blockers are pharmaceuticals used to treat cardiovascular diseases such as hypertension, angina pectoris, and arrhythmia. Due to high consumption, they are continuously released into the environment, being detected in many aqueous matrices. The aim of this research is to test the effectiveness of two green liquid-phase microextraction procedures, such as dispersive liquid-liquid microextraction (DLLME) and solidification of floating organic droplet microextraction (SFOME) for the selective extraction of eight beta-blockers (atenolol, nadolol, pindolol, acebutolol, metoprolol, bisoprolol, propranolol, and betaxolol) from aqueous matrices for their analysis by gas chromatography (GC) or liquid chromatography (LC).
View Article and Find Full Text PDFEvaluation of the short-term stability of 6α-chloro-testosterone, 6β-bromo-androstenedione and 6-oxo-androstenedione in dimethylsulfoxide and methanol using liquid and gas chromatography - mass spectrometry.
Steroids
March 2025
Laboratorio Antidoping FMSI, Federazione Medico Sportiva Italiana, Rome, Italy; REDs - Research and Expertise on Anti-Doping Sciences, Institute of Sport Science, University of Lausanne, Lausanne, Switzerland.
This work studied the short-term stability of 6α-chloro-testosterone (6-CT), 6β-bromo-androstenedione (6-BrAED) and 6-oxo-androstenedione (6-oxo-AED) in methanol (MeOH) and dimethylsulfoxide (DMSO) solutions by gas and liquid chromatography coupled to mass spectrometry. Solutions of 6-CT, 6-BrAED and 6-oxo-AED were prepared in MeOH and DMSO. They were stored at room temperature, +4°C and -20 °C.
View Article and Find Full Text PDFAssessment of organophosphate pesticides in soils and vegetables from agricultural areas of Delta Central District, Nigeria.
Sci Rep
March 2025
Faculty of Environmental Management, Prince of Songkla University, Songkhla, Thailand.
The application of agrochemicals such as organophosphate pesticides (OPPs) has several benefits in agriculture but also poses great risks to the environment and human well-being. Thus, this study was conducted to determine the concentrations, distribution pattern, relationships, potential risks and sources of OPPs in agricultural soils and vegetables from Delta Central District (DCD) of Nigeria to provide useful information for pollution history, establishment of pollution control measures and risk management. Fourteen OPPs were determined in the soil and vegetables using a gas chromatograph-mass selective detector (GC-MSD).
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