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Design and Construction of a Personal-Computer-Based Automatic Titrator

British Geological Survey, Wallingford, Oxon OX10 8BB, England

P. Venema

Dep. of Soil Science and Plant Nutrition, Wageningen Agricultural Univ., P.O. Box 8005, 6700 EC, Wageningen, the Netherlands

* Corresponding author ( dgk{at}bgs.ac.uk).

ABSTRACT

We designed and constructed an automatic titrator that uses a personal computer (PC) and commercially available components. The titrator can be used for a wide variety of tasks including pH logging, titrations (including "salt titrations"), and two-way pH stats. The titrator is programmed using a simple command language that enables it to carry out a timed sequence of commands. Examples are given that illustrate the titrator's use for: conventional acid-base titration using dynamic dose sizing; the base-acid-base titration of an acid soil; and the automatic determination of Cd binding by humic acid at a fixed pH.

Received for publication January 24, 1994.

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