A dipstick sensor for coulometric acid-base titrations
|Abstract:||By performing an acid-base titration by coulometric generation of OH− or H+ ions at an inert electrode in close proximity to the pH-sensitive gate of an ISFET, it is possible to determine the acid or base concentration of a solution using the ISFET as an indicator device for the equivalence point in the titration curve. Typical values for the titration time are 0.1 to 10 s for acid or base concentrations ranging from 0.5 × 10−3 to 10 × 10−3 mol/l.
By placing the counter electrode for the supplied current on the backside of a small piece of printed-circuit board on which the sensor-actuator is attached, we obtain a dipstick-like structure.
|Copyright:||© 1989 Elsevier|
Electrical Engineering, Mathematics and Computer Science (EEMCS)
|Link to this item:||http://purl.utwente.nl/publications/70585|
|Export this item as:||BibTeX|
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