Results 21 to 30 of about 26,523 (162)
Simultaneous quantifications of four purine derivatives biomarkers in cow milk by SPE HPLC-DAD
Czech Journal of Food Sciences, 2021 In this study, simultaneous quantification of allantoin, uric acid, xanthine, and hypoxanthine in cow milk by solid phase extraction (SPE) and high performance liquid chromatography-diode array detection (HPLC-DAD) method was perform.
Mihaela Vlassa +2 more
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HPLC-DAD Evidence of the Oscillatory Chiral Conversion of Phenylglycine [PDF]
Journal of Chromatographic Science, 2013 Previous studies by the authors have used thin-layer chromatography to demonstrate the ability of chiral low molecular weight carboxylic acids to undergo spontaneous oscillatory chiral conversion in abiotic (aqueous and nonaqueous) solutions. General mechanisms of this conversion were proposed, taking into account the enol/enolate anion intermediary ...
Mieczysław, Sajewicz +2 more
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Quantification of Caffeoylquinic Acids in Coffee Brews by HPLC-DAD [PDF]
Journal of Analytical Methods in Chemistry, 2014 The influence of different brewing conditions on the concentration of the main caffeoylquinic acids (3-caffeoylquinic acid (3-CQA), 4-caffeoylquinic acid (4-CQA), and 5-caffeoylquinic acid (5-CQA)) was investigated. For this purpose, twenty-four coffee brews were extracted and analyzed using HPLC-DAD at 325 nm. Our findings demonstrate the great impact
Marzieh Moeenfard +2 more
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Comparative Study Between MALDI-TOF-MS and HPLC-DAD-TOF- MS Techniques in Identifying Dyes in A Heritage Caucasian Carpet [PDF]
مجلة کلية الآثار - جامعة القاهرةVariant techniques have been utilized in the identification of dyes in heritage textiles and carpets. Mass spectrometry is the most used one either in an invasive way by extraction of dyes from fibers or in a non-invasive way by direct analysis without ...
Nabil Mabrouk
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Molecules, 2022 Ginseng (Panax quinquefolius), a popular herbal and nutritional supplement consumed worldwide, has been demonstrated to possess vital biological activities, which can be attributed to the presence of ginsenosides. However, the presence of ginsenosides in
Bo-Yang Hsu +3 more
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A Decomposition Model for HPLC-DAD Data Set and Its Solution by Particle Swarm Optimization
Applied Computational Intelligence and Soft Computing, 2014 This paper proposes a separation method, based on the model of Generalized Reference Curve Measurement and the algorithm of Particle Swarm Optimization (GRCM-PSO), for the High Performance Liquid Chromatography with Diode Array Detection (HPLC-DAD) data ...
Lizhi Cui +5 more
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Journal of Fundamental and Applied Sciences, 2015 The chemical profiles of Tasmanian Leatherwood and Manuka honeys from Tasmania and New Zealand have been compared by a combination of GC-MS analysis of volatiles and semi-volatiles, RP-HPLC-DAD analysis of phenolics and flavonoids and HPLC-DAD analysis ...
D. M. Meloncelli +2 more
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Journal of Analytical Methods in Chemistry, 2014 Objective. To develop and compare HPLC-DAD and UHPLC-UV assays for the quantitation of posaconazole in bulk powder and suspension dosage form. Methods. Posaconazole linearity range was 5–50 μg/mL for both assays. For HPLC-DAD assay, samples were injected
Dalia A. Hamdy, Tarek S. Belal
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Detection of antibacterial residues in milk by HPLC-DAD and microbial inhibitor tests
Czech Journal of Food Sciences, 2020 The objective of this study was to assess the detection sensitivity of four commercial microbial inhibition assays (MIAs) in comparison with the results by High Pressure Liquid Chromatography with Diode Array Detection (HPLC-DAD) for residues of three ...
Sofia Christoforidou +5 more
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HPLC-DAD determination of imidacloprid in onion
Pesticidi, 2003 Imidacloprid is an insecticide most commonly used on vegetables, potato sugar beet, fruit, cereal, maize and rice. Imidacloprid residue has been determined in spiked onion and in onion samples. Sample preparation consisted of dichlormethane extraction of imidacloprid from onion, followed by purification of the obtained extract on a LC-Florisil ...
Aljosa Mandic +2 more
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