Validated green high‐performance liquid chromatographic methods for the determination of coformulated pharmaceuticals: A comparison with reported conventional methods

Q3 · CHEMISTRY

Article

Author: Salem, Maissa Y. ; Abd El Fattah, Laila E. ; Elzanfaly, Eman S. ; Saad, Samah S. ; Hegazy, Maha A.

The introduction of sustainable development concepts to analytical laboratories has recently gained interest, however, most conventional high‐performance liquid chromatography methods do not consider either the effect of the used chemicals or the amount of produced waste on the environment. The aim of this work was to prove that conventional methods can be replaced by greener ones with the same analytical parameters. The suggested methods were designed so that they neither use nor produce harmful chemicals and produce minimum waste to be used in routine analysis without harming the environment. This was achieved by using green mobile phases and short run times. Four mixtures were chosen as models for this study; clidinium bromide/chlordiazepoxide hydrochloride, phenobarbitone/pipenzolate bromide, mebeverine hydrochloride/sulpiride, and chlorphenoxamine hydrochloride/caffeine/8‐chlorotheophylline either in their bulk powder or in their dosage forms. The methods were validated with respect to linearity, precision, accuracy, system suitability, and robustness. The developed methods were compared to the reported conventional high‐performance liquid chromatography methods regarding their greenness profile. The suggested methods were found to be greener and more time‐ and solvent‐saving than the reported ones; hence they can be used for routine analysis of the studied mixtures without harming the environment.

12 Apr 2011·Journal of Pharmacy and PharmacologyQ3 · MEDICINE

Aggregation of antiacetylcholme drugs in aqueous solution: micellar properties of some diphenylmethane derivatives

Q3 · MEDICINE

Article

Author: Attwood, D

AbstractLight scattering methods have been used to examine the aggregation in aqueous solution of a series of antiacetylcholine drugs based on the diphenylmethane nucleus. The drugs investigated included adiphenine hydrochloride, piperidolate hydrochloride, benztropine mesylate, orphenadrine hydrochloride, chlorphenoxamine hydrochloride, lachesine hydrochloride, poldine methylsulphate, pipenzolate bromide, clidinium bromide, benzilonium bromide and ambutonium bromide. A micellar pattern of association was established for all compounds and critical micellar concentrations and aggregation numbers have been determined.

01 Jan 2008·Spectrochimica Acta Part A: Molecular and Biomolecular SpectroscopyQ2 · CHEMISTRY

Spectrophotometric determination of some histamine H1-antagonists drugs in their pharmaceutical preparations

Q2 · CHEMISTRY

Article

Author: Wafaa S. Hassan ; Magda M. El-Henawee ; Ayman A. Gouda

Two rapid, simple and sensitive extractive specrophotometric methods has been developed for the determination of three histamine H1-antagonists drugs, e.g., chlorphenoxamine hydrochloride (CPX), diphenhydramine hydrochloride (DPH) and clemastine (CMT) in bulk and in their pharmaceutical formulations. The first method depend upon the reaction of molybdenum(V) thiocyanate ions (Method A) with the cited drugs to form stable ion-pair complexes which extractable with methylene chloride, the orange red color complex was determined colorimetrically at lambda(max) 470nm. The second method is based on the formation of an ion-association complex with alizarin red S as chromogenic reagents in acidic medium (Method B), which is extracted into chloroform. The complexes have a maximum absorbance at 425 and 426nm for (DPH or CMT) and CPX, respectively. Regression analysis of Beer-Lambert plots showed a good correlation in the concentration ranges of 5.0-40 and 5-70microgmL(-1) for molybdenum(V) thiocyanate (Method A) and alizarin red S (Method B), respectively. For more accurate analysis, Ringbom optimum concentration ranges were calculated. The molar absorptivity, Sandell sensitivity, detection and quantification limits were calculated. Applications of the procedure to the analysis of various pharmaceutical preparations gave reproducible and accurate results. Further, the validity of the procedure was confirmed by applying the standard addition technique and the results obtained in good agreement well with those obtained by the official method.

100 Deals associated with Chlorphenoxamine Hydrochloride

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KEGG	Wiki	ATC	Drug Bank
D07684	Chlorphenoxamine Hydrochloride	R06AA06 D04AA34	DB09007

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