Abstract

The performance of ion-selective electrodes in a flow injection system under manual or active computer control is discussed. The response of the fluoride-selective membrane electrode was not Nemstian, and depended on several parameters. With appropriate standardization, the results were quite satisfactory. Precision was typically 3%; 60 determinations per hour are possible in the concentration range 20–200 ppb. The detection limits of the electrodes are below the values found m other measurement modes.

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