Analytical Electochemistry, Second Edition by Joseph Wang(auth.)

By Joseph Wang(auth.)

Content material:
Chapter 1 primary techniques (pages 1–27):
Chapter 2 examine of Electrode Reactions (pages 28–59):
Chapter three Controlled?Potential concepts (pages 60–99):
Chapter four sensible issues (pages 100–139):
Chapter five Potentiometry (pages 140–170):
Chapter 6 Electrochemical Sensors (pages 171–202):

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Extra resources for Analytical Electochemistry, Second Edition

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Such a parabolic shape corresponds to a linear change of the charge with the potential. The deviation from a parabolic shape depends on the solution composition, particularly on the nature of the anions present in the electrolyte. , halides) with the FIGURE 1-16 Electrocapillary curves of background (j), ethynylestradiol (), b-estradiol (m) and morgestrel (r). ) SUPPLEMENTARY READING 25 mercury surface, occurring at positive potentials, causes deviations from parabolic behavior (with shifts of Epzc to more cathodic potentials).

4a. J. G. Compton, Anal. , 72, 198A (2000). 5. D. Grahame, Chem. Rev. 41, 441 (1947). 6. A. Swietlow, M. Skoog, and G. Johansson, Electroanalysis, 4, 921 (1992). 7. C. Grahame, Annu. Rev. Phys. , 6, 337 (1955). 8. D. Mohilner, Electroanal. , 1, 241 (1966). 9. O'M. A. Devanathan, and K. Muller, Proc. R. , 55, A274 (1963). 10. R. Parsons, J. Electrochem. , 127, 176C (1980). 11. B. Mark, Analyst 115, 667 (1990). 12. M. Bond, I. Heritage, and M. Briggs, Langmuir, 1, 110 (1985). Questions 1. Show or draw the concentration pro®le/gradient near the electrode surface during a linear scan voltammetric experiment in stirred a solution.

The shape of the p  voltammogram is a function of k  = paD (where a ˆ nFv=RT ). As k  = paD increases, p the process approaches the reversible case. , at very fast v) the system exhibits an irreversible behavior. Overall, the voltammograms of a quasi-reversible system are more drawn-out and exhibit a larger separation in peak potentials compared to those of a reversible system (Figure 2-5, curve B). 2 Study of Reaction Mechanisms One of the most important applications of cyclic voltammetry is for qualitative diagnosis of chemical reactions that precede or succeed the redox process (1).

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