Results 31 to 40 of about 771,767 (433)

Current developments in LC-MS for pharmaceutical analysis [PDF]

, 2002
The current developments in liquid chromatography-mass spectrometry (LC-MS) and its applications to the analysis of pharmaceuticals are reviewed. Various mass spectrometric techniques, including electrospray and nanospray ionization, atmospheric pressure
Lim, Chang-Kee, Lord, Gwyn A.
core   +1 more source

STRUCTURE OF METHYLPHEOPHORBIDE-RCI [PDF]

, 1986
he methanolic extract of the cyanobacterium (blue-green alga) Spirulina geitleri has been treated with methanolic acid to convert all chlorophyllous pigments to their methylpheophorbides.
Budzikiewicz H., Dismukes G. C., Dornemann D., Dornemann D., Dornemann D., Feher G., Fischer H., Fuhrhop J.H., Harrison J. E., Hynninen P. H., Hynninen P. H., Klimov V. V., Knaff D. B., Moore R. E., Norris J.R., O'Malley P. J., Schaffernicht H., Schatz G. H., Scheer H., Scheer H., Senger H., Svec W. A., Thomas J. A., Vacek K., Vierling E., Wasielewski M., Wu S.M., Yuasa M.   +27 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

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., Schleicher, E. D., Wieland, O. H.   +2 more
core   +1 more source

Rapid Characterization and Identification of Flavonoids in Radix Astragali by Ultra-High-Pressure Liquid Chromatography Coupled with Linear Ion Trap-Orbitrap Mass Spectrometry.

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, Xiao-jie Xu, Wen Xu, Juan Huang, Da-yuan Zhu, Xiao-hui Qiu   +5 more
semanticscholar   +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., Lord, K. A., Williams, I. H.   +2 more
openaire   +2 more sources

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, Celito Crivellaro Guerra, Ana Beatriz Costa Czermainski, Leonardo Ferrari, Ana Maria Bergold   +4 more
doaj   +1 more source

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, Tadao Ogawa, Takanori Mizuno   +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., Rajanit, Sojitra, Savaj, Bhadresh V   +2 more
core   +2 more sources

Quantitative estimation of urinary ortho-cresol by high pressure liquid chromatography for biomonitoring of toluene exposed population

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, Amit Chakrabarti, Geoffrey Nengzapum   +2 more
doaj   +1 more source