Coulometric Titration Experiments

What follows is a bibliography taken from the Journal of Chemical Education in March of 2013 searching on the terms “Coulometric” and “Coulometry” in the title. Some of these references are actually pretty old and refer to apparatus that is no longer available, but that shouldn’t matter – the chemistry is the same, and, many of these experiments could be done much more easily now, especially with the MicroLab interface and software in conjunction with MicroLab’s coulometry accessories.

Coulometric titrations have historically been surrounded by an aura of mystery and remained the bailiwick of dyed-in-the-wool electrochemists, requiring home built constant current or constant voltage sources with fancy custom detector circuits and lots of time and motivation. Some of this is evident in the references below.

Well, no more! MicroLab has made coulometry much simpler, and accessible to any chemist with an analytical bent and a hankering to try something interesting and put it in the curriculum.

The MicroLab FS522 lab interface with its accessory Model 292 Coulometric Titration Module and one-click Coulometric Titration software make it easy to get started. Add a few items readily available from your stockroom, from MicroLab, or from your regular chemical suppliers (such as Sigma Aldrich, Flinn Scientific, Fisher) – items such as graphite electrodes, silver wire, Pt wire, agar, beakers, magnetic stirrer, and clamps – and you are ready to get started.

Though these references contain a wealth of information and ideas to use, you don’t really need to dig through them to get started. MicroLab has developed some coulometric titration experiments and a demonstration video to get you started right out of the box once you have the FS522, the latest software, and the Model 292 Coulometric Titration Module. The CD with the experiments comes with the 292 unit. The experiments are also available for download

Coulometric Analysis Experiment for the Undergraduate Chemistry Laboratory
Rajeev B. Dabke, Zewdu Gebeyehu, and Ryan Thor
J. Chem. Educ., 2011, 88 (12), pp 1707–1710

Simple and Automated Coulometric Titration of Acid Using Nonisolated Electrodes
Thomas S. Kuntzleman, Joshua B. Kenney, Scott Hasbrouck, Michael J. Collins, and John R. Amend
J. Chem. Educ., 2011, 88 (11), pp 1565–1568

The Characterization of a Custom-Built Coulometric Karl Fischer Titration Apparatus
Victoria C. Dominguez, Cole R. McDonald, Matt Johnson, Doug Schunk, Rod Kreuter and Dan Sykes, Benjamin T. Wigton and Balwant S. Chohan
J. Chem. Educ., 2010, 87 (9), pp 987–991

A Fast Coulometric Estimation of Avogadro’s Number
Nicholas C. Thomas , Carole Bennett
J. Chem. Educ., 2007, 84 (10), p 1667

Moisture Analysis in Lotion by Karl Fischer Coulometry. An Experiment for Introductory Analytical Chemistry
Patricia Ann Mabrouk and Kristine Castriotta
J. Chem. Educ., 2001, 78 (10), p 1385

A Variety of Electrochemical Methods in a Coulometric Titration Experiment
Albert Lotz
J. Chem. Educ., 1998, 75 (6), p 775

Constant-Current Coulometric Titration of Hydrochloric Acid
James Swim , Edward Earps , Laura M. Reed and David Paul
J. Chem. Educ., 1996, 73 (7), p 679

Ascorbic Acid Determination in Natural Orange Juice: As a Teaching Tool of Coulometry and Polarography
Mauro Bertotti , Jorge Moreira Vaz and Rogerio Telles
J. Chem. Educ., 1995, 72 (5), p 445

A century and a half of silver-based coulometry
John T. Stock
J. Chem. Educ., 1992, 69 (12), p 949

Coulometric titrations using computer-interfaced potentiometric endpoint detection
Paul D. Greenspan , David E. Burchfield and Hans Veening
J. Chem. Educ., 1985, 62 (8), p 688

Analysis of hypochlorite in commercial liquid bleaches by coulometric titration
Van T. Lieu and Gene E. Kalbus
J. Chem. Educ., 1975, 52 (5), p 335

Comparison of endpoint methods. A coulometric titration experiment
Stanford L. Tackett
J. Chem. Educ., 1972, 49 (1), p 52

Coulometric titration of cyclohexene with bromine
Dennis H. Evans
J. Chem. Educ., 1968, 45 (2), p 88

Coulometry: A series experiment
K. A. Van Lente
J. Chem. Educ., 1966, 43 (6), p 306

Coulometric Titrations in Wine Samples
Gabriel Gojon
J. Chem. Educ., 2004, 81 (1), p 35

Analysis of commercial vitamin C tablets by iodometric and coulometric titrimetry
Daniel G. Marsh , Deborah L. Jacobs and Hans Veening
J. Chem. Educ., 1973, 50 (9), p 626