ISSN : .....
chromatography@scientificliterature.org
Abstract
In this communication an attempt has been made to compare the two major classes of natural dyes-Anthraquinoid and Indigoid with their synthetic analog. Madder (Rubia cordifolia n Rubia tinctorum L.) and Indigo (Indigofera tinctoria) dyes were used for this study.
Keywords
Madder dye; Indigo dye; HPTLC; Imaging system; Densitometer; Chromatogram
Abstract
This paper describes a gas chromatography-mass spectrophotometry (GC-MS) method with selected-ion monitoring (SIM ) for the measurement of urine cocaine levels. Cocaine and codeine (internal standard, IS) were extracted from human urine with a mixture of diethylether and ethylacetate at basic pH with liquid-liquid extraction. Calibration curve was linear over the concentration range 50-2000 ng mL-1.
Keywords
Cocaine; GC-MS; Liquid-liquid extraction; Validation
Abstract
A HPLC method was developed for the simultaneous determination of six water-soluble vitamins, thiamine (B1), riboflavin (B2), nicotinic acid (B3), pyridoxine (B6), biotin (B7) and folic acid (B9) in milk, human urine and multivitamin pharmaceutical formulations.
Keywords
Cocaine; GC-MS; Liquid-liquid extraction; Validation
Abstract
The application of soluble in water Ionic Liquids (ILs) as alternatives to conventional
organic solvents in liquid-liquid extraction of Quercetin (Q) from frozen red onion
(Allium cepa L.) was investigated.
Keywords
Quercetin, Extraction from red onion, Ionic liquids, Hydrogen bonding interaction
Abstract
High performance liquid chromatographic method for determination of metformin in human plasma was developed. The method involved deproteinisation of the sample with methanol and analysis of the supernatant using Zorbax 300 – SCX, 4.6 X 150mm
ID and UV detection at a wavelength of 233 nm.
Keywords
Tuberculosis, Anti-tuberculosis treatment, Diabetes mellitus, Metformin,
Pharmacokinetics
Abstract
An accurate, rapid, selective and specific stability indicating RP-HPLC-UV method was
developed for the simultaneous determination of Epalrestat and Pregabalin in
combined pharmaceutical formulation. Chromatographic separation was achieved on
Discovery ODS C18 column (250 × 4.6 mm, 5 μm) with UV detection at 241 nm. The
mobile phase consisting of 0.1% Ortho Phosphoric Acid (OPA) and acetonitrile in a
ratio of 50:50, v/v and at a flow rate of 1.0 mL/min.
Keywords
Epalrestat, Pregabalin, Validation, Linearity
Abstract
A reversed-phase high-performance liquid chromatographic method has been developed for the simultaneous quantitation of water-soluble vitamins like ascorbic acid (C), thiamine (B1), riboflavin (B2), niacin (B3), pantothenic acid (B5), pyridoxine (B6) and folic acid (B9) in five potent wild edible plants named Castanopsisindica, Fagopyrum cymosum, Ficus clavata, Ficus geniculata and Ficus pomifera consumed by
the tribal people of North-eastern region in India.
Keywords
Wild edible plants, Water soluble vitamins, B group vitamins,
Vitamin C, HPLC Analysis
Abstract
The thermodynamic and acid base properties of some polymeric materials such as polylactides used in many industrial applications were determined by using the inverse gas chromatography technique at infinite dilution. Retention volume of the injected organic probes into the chromatographic column containing the investigated
polymer was obtained by using this powerful technique.
Keywords
Free energy of Adsorption, Specific enthalpy and entropy,
Lewis acid and base constants, Donor and acceptor number of electron, Glass transition, Hamieh’s model
Abstract
In their paper published in the Journal of Chemical Engineering Data, Ugraskan, et al. made several inaccuracies in the determination of the surface properties of sodium alginate by using the Inverse Gas Chromatography (IGC) technique.
Keywords
Dispersive component of surface, energy of solid, Specific enthalpy of adsorption, Acid base constant in lewis terms, Inverse gas chromatography
Abstract
An optimized extraction procedure followed by a validated High–Performance Thin–Layer Chromatography (HPTLC) was applied for the assay of chlorpyrifos (CPF) levels in postmortem blood obtained in seven fatal intoxication cases.
Keywords
Liquid–liquid extraction, Whole blood, Chlorpyrifos, High–performance thin–layer, Chromatography, Validation