نتایج جستجو برای: hplc pda esi msn
تعداد نتایج: 48597 فیلتر نتایج به سال:
Aims: The use of simple, low cost, high -efficiency extraction methods for sample preparation in the forensic toxicology has been considered. Nowadays, the chemometrics technique can be used to determine the influencing factors on the response to optimize extraction methods. The aim of this study was to design and optimize a dispersive liquid-liquid microextraction (DLLME) method for extraction...
General chemical synthesis methods. Anhydrous solvents were obtained commercially. Solvents required for oxime ligation coupling reactions were distilled from 2,4-dinitrophenylhydrazine immediately prior to use. Air-sensitive reactions were carried out under Ar. Thin layer chromatography (TLC) was performed on aluminium sheets coated with 60 F254 silica. Flash column chromatography was performe...
This paper described a fast, simple, and small scale method of sample preparation followed by High-Performance Liquid Chromatography (HPLC) coupled Photo-Diode Array (PDA) detector for quantification of canthaxanthin in chicken liver and fat, and hen’s egg yolk. The HPLC-PDA was performed on a C18 column with an isocratic mobile phase. Analyte was extracted from the sample using a handheld ultr...
Trimetallic nickel dithiolene complexes with two tetrathiooxalate (tto) ligands were obtained by a reaction monitored by ESI-mass spectrometry followed by HPLC separation and were characterized by elemental or crystal structural analysis, MO calculations, and electrical conductivity measurements.
Edible flowers are a new “old” trend in modern gastronomy and healthy nutrition aimed at increasing food attractiveness improving the consumption of beneficial phytocompounds that have valuable properties. Cucumber (Cucumis sativus L., Cucurbitaceae family) is well-known agricultural product; it an important crop commonly used across globe. Despite sufficient knowledge nutrients secondary metab...
In this study, a novel mesoporous silica nanoparticles drug carrier contributes to improving the solubility, dissolution, and the oral bioavailability of apigenin (AP). The apigenin of solid dispersion of mesoporous silica nanoparticles (AP-MSN) was prepared by physical absorption method and also, in-vitro drug release and in-vivo bioavailability performance were evaluated. Based on its solubil...
This paper described an organic solvent-free, rapid, simple, and space-saving method of sample preparation followed by HPLC coupled photo-diode array (PDA) detector for simultaneous quantification of cyromazine (CYR) and its decycropropylated metabolite, melamine (MEL), in milk. The HPLC-PDA was performed on an Inertsil® HILIC column with an isocratic aqueous mobile phase. Analytes were extract...
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