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The fluoride ion-selective electrode in flow injection analysis: Part 1. General Methodology

✍ Scribed by Wolfgang Frenzel; Peter Brätter

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
631 KB
Volume
185
Category
Article
ISSN
0003-2670

No coin nor oath required. For personal study only.

✦ Synopsis

A simple flow-injection system for determination of traces of fluoride by means of the fluoride-selective electrode is presented. A comparison of several flow-cell arrangements confirmed the advantages of a wall-jet design. Systematic investigations of the parameters affecting response times (i.e., polishing procedure, flow rate, carrier composition) established the optimal experimental conditions for measurements down to 1 pg 1-l fluoride. Calibration plots in the lower rg l-' range were neither Nernstian nor linear, but good precision (0.5-5%)

was obtained even when the potential differences for concentration steps of one decade were as small as 3 mV.

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