TY - JOUR
T1 - A dipstick sensor for coulometric acid-base titrations
AU - Olthuis, Wouter
AU - van der Schoot, B.H.
AU - Chavez, F.
AU - Bergveld, P.
PY - 1989
Y1 - 1989
N2 - 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.
AB - 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.
U2 - 10.1016/0250-6874(89)80092-7
DO - 10.1016/0250-6874(89)80092-7
M3 - Article
VL - 17
SP - 279
EP - 283
JO - Sensors and actuators
JF - Sensors and actuators
SN - 0250-6874
IS - 1-2
ER -