581425-U

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Showing 1-15 of 15 results for "581425-U" within Papers

Superficially porous particles columns for super fast HPLC separations.

Imran Ali et al.

Biomedical chromatography : BMC, 26(8), 1001-1008 (2012-01-13)

Superficially porous silica particles columns (SPSPCs) are manufactured by different companies. The most common have the brand names Halo, Ascentis Express and Kinetex. These columns provide super fast, sharp peaks and moderate sample loading and back pressure. These are available

A fully automated and fast method using direct sample injection combined with fused-core column on-line SPE-HPLC for determination of ochratoxin A and citrinin in lager beers.

Ivona Lhotská et al.

Analytical and bioanalytical chemistry, 408(12), 3319-3329 (2016-03-20)

A new fast and sensitive method based on on-line solid-phase extraction on a fused-core precolumn coupled to liquid chromatography with fluorescence detection has been developed for ochratoxin A (OTA) and citrinin (CIT) determination in lager beer samples. Direct injection of

Gradient RP-HPLC method for the determination of potential impurities in atazanavir sulfate.

Sreenivasa Rao Chitturi et al.

Journal of pharmaceutical and biomedical analysis, 55(1), 31-47 (2011-02-15)

This paper proposes a simple and selective RP-HPLC method for the determination of process impurities and degradation products (degradants) of atazanavir sulfate (ATV) drug substance. Chromatographic separation was achieved on Ascentis(®) Express C8, (150mm×4.6mm, 2.7μm) column thermostated at 30°C under

Label-free assay based on immobilized capillary enzyme reactor of Leishmania infantum nucleoside triphosphate diphosphohydrolase (LicNTPDase-2-ICER-LC/UV).

Luana Magalhães et al.

Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 1008, 98-107 (2015-12-08)

Nucleoside triphosphate diphosphohydrolase (NTPDase) is an enzyme belonging to the apyrase family that participates in the hydrolysis of the nucleosides di- and triphosphate to the corresponding nucleoside monophosphate. This enzyme underlies the virulence of parasites such as Leishmania. Recently, an

HPLC column-switching technique for sample preparation and fluorescence determination of propranolol in urine using fused-core columns in both dimensions.

Dalibor Satínský et al.

Analytical and bioanalytical chemistry, 405(20), 6583-6587 (2013-06-12)

A new and fast high-performance liquid chromatography (HPLC) column-switching method using fused-core columns in both dimensions for sample preconcentration and determination of propranolol in human urine has been developed. On-line sample pretreatment and propranolol preconcentration were performed on an Ascentis

Comparison between evaporative light scattering detection and charged aerosol detection for the analysis of saikosaponins.

Han Young Eom et al.

Journal of chromatography. A, 1217(26), 4347-4354 (2010-05-11)

Saikosaponins are triterpene saponins derived from the roots of Bupleurum falcatum L. (Umbelliferae), which has been traditionally used to treat fever, inflammation, liver diseases, and nephritis. It is difficult to analyze saikosaponins using HPLC-UV due to the lack of chromophores.

Validation and application of a stability-indicating HPLC method for the in vitro determination of gastric and intestinal stability of venlafaxine.

Ebenezer B Asafu-Adjaye et al.

Journal of pharmaceutical and biomedical analysis, 43(5), 1854-1859 (2007-02-16)

Gastrointestinal stability of venlafaxine was evaluated in vitro in simulated gastric (SGF) and intestinal (SIF) fluids using a stability indicating HPLC method. The method was validated using a 5 microm Ascentis C18 column (150 mm x 4.6 mm) and mobile

Development and validation of an HPLC-MS/MS method to determine clopidogrel in human plasma. Use of incurred samples to test back-conversion.

Luigi Silvestro et al.

Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 878(30), 3134-3142 (2010-10-20)

Quantitative methods using LC-MS/MS allow achievement of adequate sensitivity for pharmacokinetic studies with clopidogrel; three such methods, with LLOQs as low as 5 pg/mL, were developed and fully validated according to the well established FDA 2001 guidelines. The chromatographic separations

New validated high-performance liquid chromatographic method for simultaneous analysis of ten flavonoid aglycones in plant extracts using a C18 fused-core column and acetonitrile-tetrahydrofuran gradient.

Monika A Olszewska

Journal of separation science, 35(17), 2174-2183 (2012-07-19)

An HPLC method of high resolution has been developed and validated for the simultaneous determination of ten prominent flavonoid aglycones in plant materials using a fused-core C18-silica column (Ascentis® Express, 4.6 mm × 150 mm, 2.7 μm). The separation was

LC-MS/MS method for the determination of clodronate in human plasma.

Mahmoud Hasan et al.

Journal of pharmaceutical and biomedical analysis, 100, 341-347 (2014-09-10)

Clodronate belongs to the class of bisphosphonates which are used for the treatment of bone disorders. Due to its high polarity it has a low and highly variable oral bioavailability which results in low plasma concentrations and requires sensitive bioanalytical

Quality by design approach for the separation of naproxcinod and its related substances by fused core particle technology column.

Ugandar Reddy Inugala et al.

Journal of chromatographic science, 51(5), 453-459 (2012-10-13)

This paper describes the development of a rapid, novel, stability-indicating gradient reversed-phase high-performance liquid chromatographic method and associated system suitability parameters for the analysis of naproxcinod in the presence of its related substances and degradents using a quality-by-design approach. All

Recent trends in ultra-fast HPLC: new generation superficially porous silica columns.

Imran Ali et al.

Journal of separation science, 35(23), 3235-3249 (2012-11-28)

New generation columns, i.e. packed with superficially porous silica particles are available as trade names with following manufacturers: Halo, Ascentis Express, Proshell 120, Kinetex, Accucore, Sunshell, and Nucleoshell. These provide ultra-fast HPLC separations for a variety of compounds with moderate

A study of retention characteristics and quality control of nutraceuticals containing resveratrol and polydatin using fused-core column chromatography.

Jakub Fibigr et al.

Journal of pharmaceutical and biomedical analysis, 120, 112-119 (2016-01-01)

A new high-performance liquid chromatography method using fused-core column for fast separation of resveratrol and polydatin has been developed and used for quality control of nutraceuticals with resveratrol and polydatin content. Retention characteristics (log k) were studied under different conditions

An on-line SPE-HPLC method for effective sample preconcentration and determination of fenoxycarb and cis, trans-permethrin in surface waters.

Dalibor Šatínský et al.

Talanta, 142, 124-130 (2015-05-25)

A new on-line SPE-HPLC method using fused-core columns for on-line solid phase extraction and large volume sample injection for increasing the sensitivity of detection was developed for the determination of insecticides fenoxycarb and cis-, trans-permethrin in surface waters. The separation

An efficient chemical analysis of phenolic acids and flavonoids in raw propolis by microwave-assisted extraction combined with high-performance liquid chromatography using the fused-core technology.

Federica Pellati et al.

Journal of pharmaceutical and biomedical analysis, 81-82, 126-132 (2013-05-07)

A closed-vessel microwave-assisted extraction (MAE) technique was optimized for the first time for the extraction of polyphenols from raw propolis. The results obtained by means of response surface experimental design methodology showed that the best global response was reached when

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