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By Peter B. Stockwell

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To educational establishments, the teaching of automatic analysis poses three problems. It is an interdisciplinary subject involving engineering, electronics, and computing in addition to chemistry. Equipment for demonstration purposes is expensive and at the present time, very few teaching staff have more than a rudimentary experience of the subject. Nevertheless, colleges are generally aware of the problems and have made important, although limited, attempts to overcome them. For example Betteridge et al.

Thus one probe dips into a vial to withdraw sample while the second is delivering sample, followed by diluent, taken from the previous vial. The holders for diluted sample are contained in a distribution assembly which serves the individual analysis channels. When the diluted sample reaches an analysis channel, termed a reaction console, a secondary sampler and diluter removes an aliquot into a cavity in a thermostated reaction rotor. All further treatment is performed in the cavity. Each rotor contains 60 such cavities.

1 attempts to illustrate the various facets of designing and developing an automatic analytical system. From this it can be seen that the overall solution is most likely to be a compromise between chemistry and computer hardware and software. It can be seen that for any particular problem all the necessary technology could be purchased directly from a commercial company. Equally, all the development could be done ‘in house’, although the most realistic solution is likely to be a hybrid of commercial modules and software and home-made devices, with some of the software modified to suit the particular needs of the laboratory.

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