Results 21 to 30 of about 1,390,801 (312)
Journal of Chromatographic Science, 2015 A simple and effective method was established for separation and characterization of flavonoid constituents in Radix Astragali (RA) by combination of ultra-high-pressure liquid chromatography with LTQ-Orbitrap tandem mass spectrometry (u-HPLC-LTQ ...
Jing Zhang +5 more
semanticscholar +1 more source
Analysis of total urinary catecholamines by liquid chromatography: methodology, routine experience and clinical interpretations of results [PDF]
, 1983 A simple routine method is described for simultaneous assay of total urinary adrenaline, noradrenaline and dopamine. The catecholamines are pre-purified on a small ion-exchange column, separated by reversed phase ion-pair liquid chromatography, and are ...
Kees, Frieder K. +2 more
core +1 more source
Retention Time Prediction for Chromatographic Enantioseparation by Quantile Geometry-enhanced Graph Neural Network [PDF]
, 2022 A new research framework is proposed to incorporate machine learning techniques into the field of experimental chemistry to facilitate chromatographic enantioseparation. A documentary dataset of chiral molecular retention times (CMRT dataset) in high-performance liquid chromatography is established to handle the challenge of data acquisition.
arxiv +1 more source
Environmental Disease, 2020 Aim: Quantification of urinary ortho-cresol (OC) by high pressure liquid chromatography coupled with photodiode array detector. Materials and Methods: Includes acid hydrolysis of urine, liquid–liquid extraction, and chromatography quantification of ...
Anupa Yadav +2 more
doaj +1 more source
High pressure liquid chromatography of benzimidazolcs
Pesticide Science, 1976 AbstractA laboratory‐assembled high pressure liquid chromatograph with variable wavelength ultraviolet detector is described. The chromatography of the systemic fungicides benomyl, thiabendazole, thiophanate, related fungicides and benzimidazoles (13 compounds in all) is described using reverse phase and adsorption systems.
Austin, D. J. +2 more
openaire +2 more sources
Enricher for Fraction of High-Pressure Liquid Chromatography [PDF]
Journal of Chromatographic Science, 2005 A device is developed for concentrating a dilute solution without losing the components with boiling points slightly higher than the solvent. The device consists of an evaporator, receptor, and approximately 100 capillaries. A dilute solution is introduced into the evaporator and heated at a lower temperature than the boiling point of the solvent with ...
Masayuki Matsui +2 more
openaire +3 more sources
Analytical Techniques for Determination of Hydrochlorothiazide and its Combinations: A Review [PDF]
, 2015 Hydrochlorothiazide is chemically 6-chloro-1, 1-dioxo-3, 4-dihydro-2 H -1, 2, 4-benzothiadiazine-7-sulfonamide. Hydrochlorothiazide is a diuretic drug used for treatment of high blood pressure(hypertension) and accumulation of fluid (edema).
Raj, Hasumati A. +2 more
core +2 more sources
Reliable LC-MS/MS-based method for trace level determination of 50 medium to highly polar pesticide residues in sediments and ecological risk assessment [PDF]
Anal Bioanal Chem. 2019 Dec;411(30):7981-7996, 2020 The occurrence of polar pesticides in sediments has not been extensively investigated because of their relatively poor hydrophobicity and apparently less persistence in the environment. However, their continuous release into the aquatic systems calls for the evaluation of their potential accumulation in sediments and the role of this matrix as a ...
arxiv +1 more source
Validation of a chromatographic method to routine analysis of trans-resveratrol and quercetin in red wines [PDF]
Pesquisa Agropecuária Brasileira, 2017 : The objective of this work was to validate a fast method with low-solvent use, for the analysis of trans-resveratrol and quercetin in red wines. The wines were prepared, using a classical method, from the grape (Vitis vinifera) cultivars Cabernet Franc,
Letícia Flores da Silva +4 more
doaj +1 more source
Glutathione conjugates of the mercapturic acid pathway and guanine adduct as biomarkers of exposure to CEES, a sulfur mustard analog [PDF]
, 2021 Sulfur mustard (SM), a chemical warfare agent, is a strong alkylating compound that readily reacts with numerous biomolecules. The goal of the present work was to define and validate new biomarkers of exposure to SM that could be easily accessible in urine or plasma. Because investigations using SM are prohibited by the Organization for the Prohibition
arxiv +1 more source