Quantitative analysis of memantine in human plasma by gas chromatography/negative ion chemical ionization/mass spectrometry. 2002

Hans Jörg Leis, and Günter Fauler, and Werner Windischhofer
University Children's Hospital, Division of Analytical Biochemistry and Mass Spectrometry, Auenbruggerplatz 30, A-8036 Graz, Austria. hans.leis@kfunigraz.ac.at

A sensitive and specific method for the determination of memantine in human plasma is presented. Memantine was extracted from plasma and derivatized to the pentafluorobenzoyl derivative in a one-step procedure avoiding any sample concentration steps. Amantadine was used as an internal standard. The compounds were measured by gas chromatography/negative ion chemical ionization mass spectrometry without any further processing. Using this detection mode, the fragment ions at m/z 353 and 325 were obtained at high relative abundance. Calibration graphs were linear over the range 0.117-30 ng ml(-1). At the limit of quantification (LOQ), the inter-assay precision was 2.00% and the intra-assay variability was 3.22%. The accuracy at the LOQ showed deviations of -1.42% (intra-assay) and -2.47% (inter-assay). The method is rugged, rapid and robust and was applied to the batch determination of memantine during pharmacokinetic profiling of the drug.

UI MeSH Term Description Entries
D008401 Gas Chromatography-Mass Spectrometry A microanalytical technique combining mass spectrometry and gas chromatography for the qualitative as well as quantitative determinations of compounds. Chromatography, Gas-Liquid-Mass Spectrometry,Chromatography, Gas-Mass Spectrometry,GCMS,Spectrometry, Mass-Gas Chromatography,Spectrum Analysis, Mass-Gas Chromatography,Gas-Liquid Chromatography-Mass Spectrometry,Mass Spectrometry-Gas Chromatography,Chromatography, Gas Liquid Mass Spectrometry,Chromatography, Gas Mass Spectrometry,Chromatography, Mass Spectrometry-Gas,Chromatography-Mass Spectrometry, Gas,Chromatography-Mass Spectrometry, Gas-Liquid,Gas Chromatography Mass Spectrometry,Gas Liquid Chromatography Mass Spectrometry,Mass Spectrometry Gas Chromatography,Spectrometries, Mass-Gas Chromatography,Spectrometry, Gas Chromatography-Mass,Spectrometry, Gas-Liquid Chromatography-Mass,Spectrometry, Mass Gas Chromatography,Spectrometry-Gas Chromatography, Mass,Spectrum Analysis, Mass Gas Chromatography
D008559 Memantine AMANTADINE derivative that has some dopaminergic effects. It has been proposed as an antiparkinson agent. 1,3-Dimethyl-5-aminoadamantane,1-Amino-3,5-dimethyladamantane,Axura,D-145,D145,Ebixa,Memantin,Memantine Hydrochloride,Namenda,D 145
D012015 Reference Standards A basis of value established for the measure of quantity, weight, extent or quality, e.g. weight standards, standard solutions, methods, techniques, and procedures used in diagnosis and therapy. Standard Preparations,Standards, Reference,Preparations, Standard,Standardization,Standards,Preparation, Standard,Reference Standard,Standard Preparation,Standard, Reference
D001793 Blood Preservation The process by which blood or its components are kept viable outside of the organism from which they are derived (i.e., kept from decay by means of a chemical agent, cooling, or a fluid substitute that mimics the natural state within the organism). Blood Preservations,Preservation, Blood,Preservations, Blood
D002138 Calibration Determination, by measurement or comparison with a standard, of the correct value of each scale reading on a meter or other measuring instrument; or determination of the settings of a control device that correspond to particular values of voltage, current, frequency or other output. Calibrations
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000547 Amantadine An antiviral that is used in the prophylactic or symptomatic treatment of influenza A. It is also used as an antiparkinsonian agent, to treat extrapyramidal reactions, and for postherpetic neuralgia. The mechanisms of its effects in movement disorders are not well understood but probably reflect an increase in synthesis and release of dopamine, with perhaps some inhibition of dopamine uptake. 1-Aminoadamantane,Adamantylamine,Adekin,Aman,Amanta,Amanta-HCI-AZU,Amanta-Sulfate-AZU,Amantadin AL,Amantadin AZU,Amantadin Stada,Amantadin-neuraxpharm,Amantadin-ratiopharm,Amantadina Juventus,Amantadina Llorente,Amantadine Hydrochloride,Amantadine Sulfate,Amixx,Cerebramed,Endantadine,Gen-Amantadine,Infecto-Flu,Infex,Mantadix,Midantan,PMS-Amantadine,Symadine,Symmetrel,Viregyt,Wiregyt,tregor,1 Aminoadamantane,AL, Amantadin,AZU, Amantadin,Amanta HCI AZU,Amanta Sulfate AZU,AmantaHCIAZU,AmantaSulfateAZU,Amantadin neuraxpharm,Amantadin ratiopharm,Amantadinneuraxpharm,Amantadinratiopharm,Gen Amantadine,GenAmantadine,Hydrochloride, Amantadine,Infecto Flu,InfectoFlu,Juventus, Amantadina,Llorente, Amantadina,PMS Amantadine,PMSAmantadine,Stada, Amantadin,Sulfate, Amantadine
D000978 Antiparkinson Agents Agents used in the treatment of Parkinson's disease. The most commonly used drugs act on the dopaminergic system in the striatum and basal ganglia or are centrally acting muscarinic antagonists. Antiparkinson Drugs,Antiparkinsonian Agents,Antiparkinsonians,Agents, Antiparkinson,Agents, Antiparkinsonian,Drugs, Antiparkinson
D001682 Biological Availability The extent to which the active ingredient of a drug dosage form becomes available at the site of drug action or in a biological medium believed to reflect accessibility to a site of action. Availability Equivalency,Bioavailability,Physiologic Availability,Availability, Biologic,Availability, Biological,Availability, Physiologic,Biologic Availability,Availabilities, Biologic,Availabilities, Biological,Availabilities, Physiologic,Availability Equivalencies,Bioavailabilities,Biologic Availabilities,Biological Availabilities,Equivalencies, Availability,Equivalency, Availability,Physiologic Availabilities
D012680 Sensitivity and Specificity Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed) Specificity,Sensitivity,Specificity and Sensitivity

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