A dipstick sensor for coulometric acid-base titrations

Wouter Olthuis; B.H. van der Schoot; F. Chavez; P. Bergveld

doi:10.1016/0250-6874(89)80092-7

A dipstick sensor for coulometric acid-base titrations

Wouter Olthuis, B.H. van der Schoot, F. Chavez, P. Bergveld

Research output: Contribution to journal › Article › Academic

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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.

Original language	English
Pages (from-to)	279-283
Journal	Sensors and actuators
Volume	17
Issue number	1-2
DOIs	https://doi.org/10.1016/0250-6874(89)80092-7
Publication status	Published - 1989

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title = "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.",

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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 -