Determination of losartan and its degradates in COZAAR tablets by reversed-phase high-performance thin-layer chromatography.

abstract：:Salicylic and benzoic acid are phenolic acids occurring in plant cells, thus they can be present in fruit and vegetables at various levels. They possess anti-inflammatory and antimicrobial properties, however they may induce symptoms and health problems in a small percentage of the population. Therefore, a low phenoli...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Aresta A,Zambonin C

更新日期：2016-03-20 00:00:00

abstract：:Applications of differential pulse anodic stripping voltammetry using a new pen-type renewed hanging mercury electrode have been investigated for trace analysis of lead in pharmaceutical substances and intermediates of their syntheses, such as procaine hydrochloride, 4-aminobenzoic acid, methyl 4-aminobenzoate, 2-(4-c...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Pravda M,Vytras K

更新日期：1996-05-01 00:00:00

abstract：:The recent interest in RX77368 for the treatment of Motor Neurone Disease (MND) has led to the requirement for an assay (RIA) capable of detecting the peptide at low levels in plasma. Several drug conjugates were prepared in which RX77368 was covalently linked to larger proteins, e.g. bovine serum albumin, keyhole lim...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Lynn AG,Bennett GW

更新日期：1991-01-01 00:00:00

abstract：:CGS 26214 is a racemic compound having cholesterol-lowering activity in rats, dogs, and monkeys. This compound has two equipotent chiral components CGS 28934(-) and CGS 28935(+). An analytical challenge was to develop a sensitive liquid chromatography/tandem mass spectrometry (LC/MS/MS) method for the analysis of the ...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Majumdar TK,Martin LL,Melamed D,Tse FL

更新日期：2000-09-01 00:00:00

abstract：:Two HPLC systems have been developed for the investigation of flumecinol (3-trifluoromethyl-alpha-ethyl-benzhydrol). The reversed-phase system (LiChrosorb RP-18; methanol-water, 7:3, v/v) enables the isolation and identification of the impurities. The chiral system (Chiralcel OD; hexane-2-propanol, 98:2, v/v) separate...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Görög S,Herényi B,Rényei M

更新日期：1992-10-01 00:00:00

abstract：:Solid phase extraction (SPE) and HPLC were used for simultaneous determination of hesperidin, diosmin and eriocitrin in Iranian lime juice samples. The method involved very simple efficient SPE with polyamide cartridge, the use of mixture of water/acetonitrile/acetic acid (78:19:3, v/v) as a mobile phase at a flow rat...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Saeidi I,Hadjmohammadi MR,Peyrovi M,Iranshahi M,Barfi B,Babaei AB,Dust AM

更新日期：2011-09-10 00:00:00

abstract：:There is increasing development of pegylated proteins as clinical products for therapeutic interventions in human disease. Quantification of such products relies on appropriately calibrated traditional methods, including reverse phase-high performance liquid chromatography (RP-HPLC). However, currently available pharm...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： El Ghazaly M,Meager A,Zikry H,Ebaed M,Shaker S,Mueller F,Rohde J

更新日期：2013-10-01 00:00:00

abstract：:The performance of ferrate(VI) in treating sulfamethoxazole (SMX), diclofenac (DCF), carbamazepine (CBZ) and bezafibrate (BZF) in test solutions containing the four compounds was investigated. A series of jar-test experiments was performed on a bench-scale at pH 6-9 and at a ferrate(VI) dose of 1-5 mg Fe/L. The result...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Zhou Z,Jiang JQ

更新日期：2015-03-15 00:00:00

abstract：:A rapid and sensitive polarographic method was developed for qualitative as well as quantitative analysis of the neurotoxic contaminant benzaldehyde in Na-diclofenac injections and in benzyl alcohol used for parental formulations. A well-defined differential pulse (DP) polarographic peak or a sampled direct current (S...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Kazemifard AG,Moore DE,Mohammadi A

更新日期：2002-09-05 00:00:00

abstract：:One of the most challenging aims in modern analytical chemistry and pharmaceutical analysis is to create models for drugs' behavior based on simulation experiments. Since drugs' effects are closely related to their molecular properties, numerous characteristics of drugs are used in order to acquire a model of passive ...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Kouskoura MG,Kachrimanis KG,Markopoulou CK

更新日期：2014-11-01 00:00:00

abstract：:The supposed 5-LO inhibitory activity of two N-omega-ethoxycarbonyl-4-quinolones was tested determining leukotriene B4 (LTB4) in RBL-1 cell cultures, pretreated with the two compounds of interest. LTB4, obtained by solid-phase extraction (SPE) from cell cultures supernatants, was determined by micellar electrokinetic ...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Bossù E,Aglianò AM,Desideri N,Sestili I,Porrà R,Grandilone M,Quaglia MG

更新日期：1999-03-01 00:00:00

abstract：:The five active drug substances and two of the excipients present in Frenadol, a cold medication, were separated. The active drug components dextromethorphan HBr monohydrate, ascorbic acid, caffeine, paracetamol and chlorpheniramine maleate were quantitatively assayed by a mixed ion pair LC method. The excipients sepa...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Thomas BR,Fang XG,Shen P,Ghodbane S

更新日期：1994-01-01 00:00:00

abstract：:Three unknown impurities and a byproduct in repaglinide bulk drug at levels below 0.1% (ranging from 0.05 to 0.1%) were detected by a simple isocratic reversed-phase high performance liquid chromatography (HPLC) method. These impurities were isolated from crude sample of repaglinide using reversed-phase preparative hi...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Reddy KV,Babu JM,Mathad VT,Eswaraiah S,Reddy MS,Dubey PK,Vyas K

更新日期：2003-07-14 00:00:00

abstract：:High throughput transducers using metal cluster resonance technology are based on surface-enhancement of metal cluster light absorption. These devices can be used for detection of biorecognitive binding, as well as structural changes of nucleic acids, proteins or any other polymer. The optical property for the analyti...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Mayer C,Stich N,Palkovits R,Bauer G,Pittner F,Schalkhammer T

更新日期：2001-03-01 00:00:00

abstract：:A rapid and simple LC-MS/MS method was developed and validated for the simultaneous determination of coniferyl ferulate (CF) and its metabolite coniferyl alcohol (CA) using bavachromene as an internal standard (IS). A TSQ Quantum Access mass spectrometer was operated under selected-reaction monitoring mode using negat...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Dai X,Pang L,Zhang Z,Yang C,Li Y

更新日期：2017-11-30 00:00:00

abstract：:An electrochemical DNA nano-biosensor is prepared by immobilization of double stranded DNA (dsDNA) onto a mixed self-assembled monolayer (SAM) composed of azide- and hydroxyl-terminated thiols. The SAMs- and dsDNA-modified gold electrodes were characterized by cyclic voltammetry (CV) and electrochemical impedance spec...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Mehdinia A,Kazemi SH,Bathaie SZ,Alizadeh A,Shamsipur M,Mousavi MF

更新日期：2009-04-05 00:00:00

abstract：:An HPLC method was developed and validated to determine trace amounts of dexamethasone related substances on dexamethasone-coated drug-eluting stents. Separation of dexamethasone from its major process impurities and degradation products was achieved on a Zorbax Eclipse XDB C8 column using gradient elution and UV dete...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Chen Q,Zielinski D,Chen J,Koski A,Werst D,Nowak S

更新日期：2008-11-04 00:00:00

abstract：:The inclusion into the beta-cyclodextrin is used to improve pharmacokinetic characteristics of hesperetin and naringenin. Solubility of hesperetin and naringenin with increasing concentrations of beta-cyclodextrin grows as long as the temperature increased. Stability constants were determined by the solubility method ...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Tommasini S,Raneri D,Ficarra R,Calabrò ML,Stancanelli R,Ficarra P

更新日期：2004-04-16 00:00:00

abstract：:The current study assesses the effect of extending column length during gradient packed column sub/supercritical fluid chromatography (PCSFC) experiments on the detection of known and unknown impurities in a drug substance sample. Quantitative drug substance impurity profiles were generated and compared using multiple...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Roston DA,Ahmed S,Williams D,Catalano T

更新日期：2001-10-01 00:00:00

abstract：:A simple and novel method for the extraction and quantification of diltiazem hydrochloride was developed and applied to homogenization and stability studies. The method used solid phase extraction coupled with reversed-phase high-performance liquid chromatography (HPLC) with ultraviolet (UV) detection. Validation show...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Buur JL,Baynes RE,Yeatts JL,Davidson G,Defrancesco TC

更新日期：2005-06-01 00:00:00

abstract：:As a vital therapeutic agent for Parkinson's disease, dosage control of levodopa has always been a major obstacle in ensuring efficacy and curbing side effects. Simple and fast electrochemical detection methods are the main force in this field. Here, we presented a differential dual-strip method based on the coulometr...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Yu C,Cao Q,Tu T,Cai Y,Fang L,Ye X,Liang B

更新日期：2020-10-25 00:00:00

abstract：:Experimental evidences now indicate that memory formation relies on the capacity of neuronal networks to manage long-term changes in synaptic communication. This property is driven by N-methyl-D-aspartate receptors (NMDAR), which requires the binding of glutamate but also the presence of the co-agonist D-serine at the...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Billard JM

更新日期：2015-12-10 00:00:00

abstract：:Hemp seed soft gel capsule (HSSGC) is a modernised dosage form that is derived from a traditional Chinese patent medicine, Hemp Seed Pills (HSP). Two dosage forms claim the same therapeutic effects; however, their chemical components and chemical equivalency are unclear. In the present study, an ultra performance liqu...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Zhou WJ,Song JZ,Fu WW,Tan HS,Bian ZX,Xu HX

更新日期：2013-10-01 00:00:00

abstract：:One of the first examples of a bienzymatic organic phase enzyme electrode (OPEE) is described. It was obtained using two enzymes (phospholipase D and choline oxidase), both immobilised in kappa-Carrageenan gel and, as electrochemical transducer, an amperometric gas diffusion electrode for oxygen. The response of the b...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Campanella L,Pacifici F,Sammartino MP,Tomassetti M

更新日期：1998-12-01 00:00:00

abstract：:Salvianolic acid B (SAB), tanshinone IIA (TS), ginsenoside Rb₁ (Rb₁), ginsenoside Rg₁ (Rg₁) and notoginsenoside R₁ (R₁) are major active ingredients of Fufang Danshen preparation (FDP) for its protective effects on myocardial ischemia. This study investigated the pharmacokinetics of marker compounds after oral adminis...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Yang S,Zhang K,Lin X,Miao Y,Meng L,Chen W,Tang X

更新日期：2012-08-01 00:00:00

abstract：:A second order derivative spectrophotometric method for the determination of bifonazole in the presence of methyl- and propyl p-hydroxybenzoate as preservatives has been developed. The determination was performed in a 0.1 M HCl solution at 241.5 nm, a wavelength corresponding to the intersection of the second order de...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Popović G,Cakar M,Agbaba D

更新日期：2003-09-15 00:00:00

abstract：:Topiroxostat is a recently identified safe and selective xanthine oxidoreductase inhibitor and has been used as a urate-lowing agent for the treatment of hyperuricemia and gout in Japan. In this study, we developed a sensitive, selective and high-throughput method that determines topiroxostat in human plasma using hig...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Feng X,Cao Y,Ding Y,Zheng H

更新日期：2020-09-10 00:00:00

abstract：:Hydrocortisone degradation products 1, 2, 3, and 4 along with hemiacetal derivatives 5, 6, 7, and 8 were observed through stressed hydrocortisone in solution. Their structures were identified based on HPLC-UV, HPLC-MS, and HPLC-HRMS (high resolution/high accuracy mass spectrometry) analyses as well as reaction mechani...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Zhang F,Zhou J,Shi Y,Tavlarakis P,Karaisz K

更新日期：2016-09-05 00:00:00

abstract：:An automated solid-phase extraction workstation was used to develop, characterize and validate two separate HPLC methods for quantifying drugs in plasma. Method development was facilitated by workstation functions which allowed wash solvents of varying organic composition to be mixed and tested automatically. The prec...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： Parker TD 3rd,Surendran N,Stewart BH,Rossi DT

更新日期：1998-08-01 00:00:00

abstract：:Herein we describe for the first time a practical analytical method for determining the enantio-purity of L-α-glycerophosphocholine (L-α-GPC) by chiral derivatization. The use of a suitable chiral boronic acid allowed the formation of a mixture of two diastereomeric boronate esters whose ratio, carefully analyzed by 1...

journal_title：Journal of pharmaceutical and biomedical analysis

authors： de Ferra L,Massa A,Di Mola A,Diehl B

更新日期：2020-05-10 00:00:00