polarography

polarography
That branch of electrochemistry concerned with the variation in current flowing through a solution as the voltage is varied; this will vary with the ionic concentration of reducible substances so that p. can be used in chemical analysis. P. is commonly employed in the form of a reduction at a dropping mercury electrode. [Mod. L. polaris, polar, + G. grapho, to write]

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po·lar·og·ra·phy .pō-lə-'räg-rə-fē n, pl -phies a method of qualitative or quantitative analysis based on current-voltage curves obtained during electrolysis of a solution with a steadily increasing electromotive force
po·laro·graph·ic pō-.lar-ə-'graf-ik adj
po·laro·graph·i·cal·ly -i-k(ə-)lē adv

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po·lar·og·ra·phy (po″lər-ogґrə-fe) an electrochemical technique for identifying and estimating the concentration of reducible elements by means of the dual measurement of the current flowing through an electrochemical cell (which contains the test solution) and the electrical potential between the two electrodes as the potential is increased at a constant rate by an external voltage source. As the voltage reaches the standard electrode potential of the test substance, there is a sharp increase in current flow. The indicator electrode is usually a dropping mercury electrode. polarographic adj

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  • Polarography — is a subclass of voltammetry where the working electrode is a dropping mercury electrode (DME), useful for its wide cathodic range and renewable surface. It was invented by Jaroslav Heyrovský.Theory of OperationPolarography is an voltammetric… …   Wikipedia

  • polarography — [pō΄lər äg′rə fē] n. [< POLARIZE + GRAPHY] an electromechanical technique of analyzing solutions that measures the current flowing between two electrodes in the solution as well as the gradually increasing applied voltage to determine… …   English World dictionary

  • polarography — polarographic /poh lar euh graf ik, peuh /, adj. /poh leuh rog reuh fee/, n. Chem. the use of a Polarograph to perform qualitative or quantitative analyses. Also called polarographic analysis. [1935 40; POLARO(GRAPH) + GRAPHY] * * * ▪ chemistry… …   Universalium

  • polarography — poliarografija statusas T sritis Standartizacija ir metrologija apibrėžtis Medžiagos kokybinės ir kiekybinės sudėties bei cheminių vyksmų tyrimo būdas, pagrįstas tiriamosios medžiagos tirpalo elektrolize. atitikmenys: angl. polarography vok.… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • polarography — poliarografija statusas T sritis Standartizacija ir metrologija apibrėžtis Voltamperinės analizės metodas, kai indikatorinis elektrodas yra lašantysis Hg elektrodas. atitikmenys: angl. polarography vok. Polarographie, f rus. полярография, f pranc …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • polarography — poliarografija statusas T sritis chemija apibrėžtis Voltamperometrinės analizės metodas, kai indikatorinis elektrodas yra lašantysis Hg elektrodas. atitikmenys: angl. polarography rus. полярография …   Chemijos terminų aiškinamasis žodynas

  • polarography — poliarografija statusas T sritis fizika atitikmenys: angl. polarography vok. Polarographie, f rus. полярография, f pranc. polarographie, f …   Fizikos terminų žodynas

  • polarography — noun Etymology: International Scientific Vocabulary, from polarization Date: 1936 a method of qualitative or quantitative analysis based on current voltage curves obtained during electrolysis of a solution with a steadily increasing electromotive …   New Collegiate Dictionary

  • polarography — noun An electrochemical technique for the analysis of redox reactions See Also: polarogram, polarograph, polarographic …   Wiktionary

  • polarography — Смотри Полярография …   Энциклопедический словарь по металлургии

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