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Electroanalytical methods

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fixed potential, at different times since the start of polarisation. Chronoamperometry is typically carried out in unstirred solution and at the fixed electrode, i.e., under experimental conditions avoiding convection as the mass transfer to the electrode. On the other hand, voltammetry is a subclass of amperometry, in which the current is measured by varying the potential applied to the electrode. According to the waveform that describes the way how the potential is varied as a function of time, the different voltammetric techniques are defined.
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In a chronoamperometry, a sudden step in potential is applied at the working electrode and the current is measured as a function of time. Since this is not an exhaustive method, microelectrodes are used and the amount of time used to perform the experiments is usually very short, typically 20 ms to 1
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Amperometry indicates the whole of electrochemical techniques in which a current is measured as a function of an independent variable that is, typically, time (in a chronoamperometry) or electrode potential (in a voltammetry). Chronoamperometry is the technique in which the current is measured, at a
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and has a constant potential, while the other one is an indicator electrode whose potential changes with the sample's composition. Therefore, the difference in potential between the two electrodes gives an assessment of the sample's composition. In fact, since the potentiometric measurement is a
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of this ion of interest. The time that takes the electrode to establish equilibrium with the solution will affect the sensitivity or accuracy of the measurement. In aquatic environments, platinum is often used due to its high
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passed. Knowing the number of electrons passed can indicate the concentration of the analyte or when the concentration is known, the number of electrons transferred in the redox reaction. Typical forms of coulometry include
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Coulometry uses applied current or potential to convert an analyte from one oxidation state to another completely. In these experiments, the total current passed is measured directly or indirectly to determine the number of
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kinetics, although an electrode made from several metals can be used in order to enhance the electron transfer kinetics. The most common potentiometric electrode is by far the glass-membrane electrode used in a
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A voltammetry consists in applying a constant and/or varying potential at an electrode's surface and measuring the resulting current with a three-electrode system. This method can reveal the
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non-destructive measurement, assuming that the electrode is in equilibrium with the solution, we are measuring the solution's potential. Potentiometry usually uses indicator electrodes made
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containing the analyte. These methods can be broken down into several categories depending on which aspects of the cell are controlled and which are measured. The three main categories are
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A variant of potentiometry is chronopotentiometry which consists in using a constant current and measurement of potential as a function of time. It has been initiated by
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passively measures the potential of a solution between two electrodes, affecting the solution very little in the process. One electrode is called the
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Grundl, Tim (1994-02-01). "A review of the current understanding of redox capacity in natural, disequilibrium systems".
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Noyhouzer, T.; Valdinger, I.; Mandler, D. (2013-09-03). "Enhanced Potentiometry by Metallic Nanoparticles".
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Electroanalysis: theory and applications in aqueous and non-aqueous media and in automated chemical control
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Laboratory Techniques in Electroanalytical Chemistry, Second Edition, Revised and Expanded
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Skoog, Douglas A.; Donald M. West; F. James Holler (1995-08-25).
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Bard, Allen J.; Faulkner, Larry R.; White, Henry S. (2022).
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Electrochemical methods: fundamentals and applications
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Electrochemical Methods: Fundamentals and Applications
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Polarography is a subclass of voltammetry that uses a
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sensitive to the ion of interest, such as fluoride in
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Modern polarographic methods in analytical chemistry
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Kissinger, Peter; William R. Heineman (1996-01-23).
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Recent Advances in Analytical Electrochemistry 2007
257:(7th ed.). Harcourt Brace College Publishers. 73:(charge passed during a certain time is recorded). 549: 236:, as well as a variety of coulometric titrations. 303:Bard, Allen J.; Larry R. Faulkner (2000-12-18). 97:, so that the potential solely depends on the 69:(electric current is the analytical signal), 943: 587: 8: 950: 936: 928: 594: 580: 572: 493:Analytical and physical electrochemistry 245: 846:Analytical and Bioanalytical Chemistry 446:(Third ed.). Hoboken, NJ: Wiley. 634:High-performance liquid chromatograph 476:. Chichester: John Wiley & Sons. 432:H. F. Weber, Wied. Ann., 7, 536, 1879 7: 1865: 886: 255:Fundamentals of Analytical Chemistry 1889: 910: 148:s, as to not consume the analyte. 25: 510:Ozomwna, Kenneth I., ed. (2007). 1888: 1876: 1864: 1853: 1852: 909: 897: 885: 874: 873: 328:Zoski, Cynthia G. (2007-02-07). 514:. Transworld Research Network. 234:controlled potential coulometry 27:Analytical methods in chemistry 619:Atomic absorption spectrometer 1: 1217:Interface and colloid science 971:Glossary of chemical formulae 95:fluoride selective electrodes 33:are a class of techniques in 529:Dahmen, E. A. M. F. (1986). 377:10.1016/0045-6535(94)90303-4 331:Handbook of Electrochemistry 1494:Bioorganometallic chemistry 981:List of inorganic compounds 624:Flame emission spectrometer 474:Analytical electrochemistry 18:Electroanalytical chemistry 1933: 1420:Dynamic covalent chemistry 1391:Enantioselective synthesis 1371:Physical organic chemistry 1324:Organolanthanide chemistry 491:Hubert H. Girault (2004). 211: 198:dropping mercury electrode 189: 168:electrochemical reactivity 155: 140: 125: 1917:Electroanalytical methods 1848: 1009:Electroanalytical methods 966: 869: 700:Ion mobility spectrometry 690:Electroanalytical methods 230:Potentiostatic coulometry 31:Electroanalytical methods 1764:Nobel Prize in Chemistry 1680:Supramolecular chemistry 1319:Organometallic chemistry 548:Bond, A. Curtis (1980). 472:Wang, Joseph C. (2000). 1702:Combinatorial chemistry 1613:Food physical chemistry 1576:Environmental chemistry 1460:Bioorthogonal chemistry 1386:Retrosynthetic analysis 1207:Chemical thermodynamics 1190:Spectroelectrochemistry 1133:Computational chemistry 860:Analytical Biochemistry 649:Melting point apparatus 556:. New York: M. Dekker. 533:. Amsterdam: Elsevier. 1774:of element discoveries 1620:Agricultural chemistry 1608:Carbohydrate chemistry 1499:Bioinorganic chemistry 1364:Alkane stereochemistry 1309:Coordination chemistry 1138:Mathematical chemistry 1004:Instrumental chemistry 839:Analytica Chimica Acta 166:of an analyte and its 1769:Timeline of chemistry 1666:Post-mortem chemistry 1651:Clandestine chemistry 1581:Atmospheric chemistry 1504:Biophysical chemistry 1336:Solid-state chemistry 1286:Equilibrium chemistry 1195:Photoelectrochemistry 731:Coning and quartering 639:Infrared spectrometer 307:(2 ed.). Wiley. 1759:History of chemistry 1714:Chemical engineering 1489:Bioorganic chemistry 1239:Structural chemistry 976:List of biomolecules 853:Analytical Chemistry 695:Gravimetric analysis 659:Optical spectrometer 603:Analytical chemistry 392:Analytical Chemistry 334:. Elsevier Science. 176:auxiliary electrodes 59:electrochemical cell 35:analytical chemistry 1782:The central science 1736:Ceramic engineering 1661:Forensic toxicology 1634:Chemistry education 1532:Radiation chemistry 1514:Interdisciplinarity 1467:Medicinal chemistry 1405:Fullerene chemistry 1281:Microwave chemistry 1150:Molecular mechanics 1145:Molecular modelling 495:. [Lausanne: EPFL. 369:1994Chmsp..28..613G 282:(2 ed.). CRC. 164:reduction potential 86:reference electrode 1825:Chemical substance 1687:Chemical synthesis 1656:Forensic chemistry 1537:Actinide chemistry 1479:Clinical chemistry 1160:Molecular geometry 1155:Molecular dynamics 1110:Elemental analysis 1063:Separation process 766:Separation process 761:Sample preparation 1904: 1903: 1840:Quantum mechanics 1805:Chemical compound 1788:Chemical reaction 1726:Materials science 1644:General chemistry 1639:Amateur chemistry 1567:Photogeochemistry 1552:Stellar chemistry 1522:Nuclear chemistry 1443:Molecular biology 1410:Polymer chemistry 1381:Organic synthesis 1376:Organic reactions 1341:Ceramic chemistry 1331:Cluster chemistry 1261:Chemical kinetics 1249:Molecular physics 1128:Quantum chemistry 1041:Mass spectrometry 925: 924: 807:Standard addition 802:Internal standard 792:Calibration curve 705:Mass spectrometry 664:Spectrophotometer 644:Mass spectrometer 629:Gas chromatograph 563:978-0-8247-6849-2 540:978-0-444-42534-8 521:978-81-7895-274-1 502:978-0-8247-5357-3 483:978-0-471-28272-3 453:978-1-119-33405-7 404:10.1021/ac401744w 398:(17): 8347–8353. 341:978-0-444-51958-0 314:978-0-471-04372-0 289:978-0-8247-9445-3 264:978-0-03-005938-4 226:bulk electrolysis 202:working electrode 143:Chronoamperometry 137:Chronoamperometry 104:electron transfer 41:by measuring the 16:(Redirected from 1924: 1892: 1891: 1880: 1868: 1867: 1856: 1855: 1800:Chemical element 1455:Chemical biology 1314:Magnetochemistry 1291:Mechanochemistry 1244:Chemical physics 1185:Electrochemistry 1090:Characterization 952: 945: 938: 929: 913: 912: 901: 889: 888: 877: 876: 812:Isotope dilution 596: 589: 582: 573: 567: 555: 544: 525: 506: 487: 458: 457: 439: 433: 430: 424: 423: 387: 381: 380: 352: 346: 345: 325: 319: 318: 300: 294: 293: 275: 269: 268: 250: 228:, also known as 180:bulk electrolyte 21: 1932: 1931: 1927: 1926: 1925: 1923: 1922: 1921: 1907: 1906: 1905: 1900: 1844: 1747: 1741:Polymer science 1697:Click chemistry 1692:Green chemistry 1586:Ocean chemistry 1562:Biogeochemistry 1508: 1424: 1396:Total synthesis 1359:Stereochemistry 1345: 1295: 1212:Surface science 1202:Thermochemistry 1171: 1114: 1085:Crystallography 990: 962: 956: 926: 921: 865: 816: 775: 719: 668: 611:Instrumentation 605: 600: 570: 564: 547: 541: 528: 522: 509: 503: 490: 484: 471: 467: 462: 461: 454: 441: 440: 436: 431: 427: 389: 388: 384: 354: 353: 349: 342: 327: 326: 322: 315: 302: 301: 297: 290: 277: 276: 272: 265: 252: 251: 247: 242: 216: 210: 194: 188: 160: 154: 145: 139: 130: 124: 79: 37:which study an 28: 23: 22: 15: 12: 11: 5: 1930: 1928: 1920: 1919: 1909: 1908: 1902: 1901: 1899: 1898: 1886: 1874: 1862: 1849: 1846: 1845: 1843: 1842: 1837: 1832: 1827: 1822: 1817: 1812: 1807: 1802: 1797: 1796: 1795: 1785: 1778: 1777: 1776: 1766: 1761: 1755: 1753: 1749: 1748: 1746: 1745: 1744: 1743: 1738: 1733: 1723: 1722: 1721: 1711: 1710: 1709: 1704: 1699: 1694: 1684: 1683: 1682: 1671: 1670: 1669: 1668: 1663: 1653: 1648: 1647: 1646: 1641: 1630: 1629: 1628: 1627: 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1092: 1087: 1082: 1081: 1080: 1075: 1068:Chromatography 1065: 1060: 1059: 1058: 1053: 1048: 1038: 1037: 1036: 1031: 1026: 1021: 1011: 1006: 1000: 998: 992: 991: 989: 988: 986:Periodic table 983: 978: 973: 967: 964: 963: 957: 955: 954: 947: 940: 932: 923: 922: 920: 919: 907: 895: 883: 870: 867: 866: 864: 863: 856: 849: 842: 835: 827: 825: 818: 817: 815: 814: 809: 804: 799: 794: 789: 783: 781: 777: 776: 774: 773: 768: 763: 758: 753: 748: 743: 738: 733: 727: 725: 721: 720: 718: 717: 712: 707: 702: 697: 692: 687: 685:Chromatography 682: 676: 674: 670: 669: 667: 666: 661: 656: 651: 646: 641: 636: 631: 626: 621: 615: 613: 607: 606: 601: 599: 598: 591: 584: 576: 569: 568: 562: 545: 539: 526: 520: 507: 501: 488: 482: 468: 466: 463: 460: 459: 452: 434: 425: 382: 363:(3): 613–626. 347: 340: 320: 313: 295: 288: 270: 263: 244: 243: 241: 238: 212:Main article: 209: 206: 190:Main article: 187: 184: 156:Main article: 153: 150: 141:Main article: 138: 135: 126:Main article: 123: 120: 78: 75: 26: 24: 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1111: 1108: 1106: 1103: 1101: 1100:Wet chemistry 1098: 1096: 1093: 1091: 1088: 1086: 1083: 1079: 1076: 1074: 1071: 1070: 1069: 1066: 1064: 1061: 1057: 1054: 1052: 1049: 1047: 1044: 1043: 1042: 1039: 1035: 1032: 1030: 1027: 1025: 1022: 1020: 1017: 1016: 1015: 1012: 1010: 1007: 1005: 1002: 1001: 999: 997: 993: 987: 984: 982: 979: 977: 974: 972: 969: 968: 965: 961: 953: 948: 946: 941: 939: 934: 933: 930: 918: 917: 908: 906: 905: 900: 896: 894: 893: 884: 882: 881: 872: 871: 868: 862: 861: 857: 855: 854: 850: 848: 847: 843: 841: 840: 836: 834: 833: 829: 828: 826: 824: 819: 813: 810: 808: 805: 803: 800: 798: 797:Matrix effect 795: 793: 790: 788: 785: 784: 782: 778: 772: 769: 767: 764: 762: 759: 757: 756:Pulverization 754: 752: 749: 747: 744: 742: 739: 737: 734: 732: 729: 728: 726: 722: 716: 713: 711: 708: 706: 703: 701: 698: 696: 693: 691: 688: 686: 683: 681: 678: 677: 675: 671: 665: 662: 660: 657: 655: 652: 650: 647: 645: 642: 640: 637: 635: 632: 630: 627: 625: 622: 620: 617: 616: 614: 612: 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511: 492: 473: 465:Bibliography 443: 437: 428: 395: 391: 385: 360: 356: 350: 330: 323: 304: 298: 279: 273: 254: 248: 233: 229: 217: 195: 192:Polarography 186:Polarography 161: 146: 131: 113: 90: 80: 30: 29: 1895:WikiProject 1120:Theoretical 1105:Calorimetry 916:WikiProject 780:Calibration 741:Dissolution 680:Calorimetry 357:Chemosphere 158:Voltammetry 152:Voltammetry 128:Amperometry 122:Amperometry 91:selectively 67:amperometry 1731:Metallurgy 1430:Biological 996:Analytical 821:Prominent 746:Filtration 673:Techniques 654:Microscope 240:References 214:Coulometry 208:Coulometry 71:coulometry 1793:Catalysis 1301:Inorganic 1095:Titration 960:chemistry 715:Titration 412:0003-2700 221:electrons 49:) and/or 43:potential 1911:Category 1859:Category 1815:Molecule 1752:See also 1177:Physical 880:Category 736:Dilution 724:Sampling 420:23947748 109:pH meter 99:activity 57:) in an 1871:Commons 1835:Alchemy 1351:Organic 892:Commons 832:Analyst 751:Masking 365:Bibcode 200:as the 172:working 55:amperes 51:current 39:analyte 1883:Portal 1029:UV-Vis 904:Portal 560:  537:  518:  499:  480:  450:  418:  410:  338:  311:  286:  261:  1056:MALDI 1024:Raman 116:Weber 47:volts 1810:Atom 1078:HPLC 558:ISBN 535:ISBN 516:ISBN 497:ISBN 478:ISBN 448:ISBN 416:PMID 408:ISSN 336:ISBN 309:ISBN 284:ISBN 259:ISBN 174:and 1820:Ion 1051:ICP 1034:NMR 400:doi 373:doi 232:or 1913:: 1550:/ 1546:/ 1398:/ 1073:GC 1046:EI 1019:IR 414:. 406:. 396:85 394:. 371:. 361:28 359:. 204:. 118:. 111:. 1784:" 1780:" 951:e 944:t 937:v 595:e 588:t 581:v 566:. 543:. 524:. 505:. 486:. 456:. 422:. 402:: 379:. 375:: 367:: 344:. 317:. 292:. 267:. 53:( 45:( 20:)

Index

Electroanalytical chemistry
analytical chemistry
analyte
potential
volts
current
amperes
electrochemical cell
potentiometry
amperometry
coulometry
Potentiometry
reference electrode
fluoride selective electrodes
activity
electron transfer
pH meter
Weber
Amperometry
Chronoamperometry
Voltammetry
reduction potential
electrochemical reactivity
working
auxiliary electrodes
bulk electrolyte
Polarography
dropping mercury electrode
working electrode
Coulometry

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