Chemistry: electrical and wave energy – Processes and products
Patent
1979-11-13
1981-04-21
Tung, T.
Chemistry: electrical and wave energy
Processes and products
204195M, 204195G, G01N 2746
Patent
active
042631041
ABSTRACT:
An improved flow independent method for electrochemical monitoring of a sample stream for the total concentration of a series of ionic species of the form X.sup.-n, H.sub.m X.sup.-n+m where n varies from 1 to m and X.sup.-n is an anion selected from the group consisting of fluoride ion, F.sup.-, and sulfide ion S.sup.-2. The pH of the sample stream is adjusted to a value below the pk.sub.a of the neutral most protonated species of the series. A first electrode sensitive to the activity of X.sup.-n is placed in the adjusted stream. The electric potential developed thereby is measured. A second electrode sensitive to the activity of hydrogen ion H.sup.+ is also placed in the adjusted stream. The electric potential developed thereby is also measured. The potential difference between the first and second electrode is a measure of the total concentration of the series X.sup.-n, H.sub.m X.sup.-n+m.
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Diggens Albert A.
Ross, Jr. James W.
Miller John B.
Orion Research Incorporated
Tung T.
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