Question

Which of these is not true for thermistors?

(a) Low sensitivity

(b) Low range

(c) Increasing the heat output

(d) generation or absorption hydrogen ions

I had been asked this question in exam.

My question is from Calorimetric Biosensors topic in division Biosensors of Enzyme Technology

Answer 1

Correct choice is (d) generation or absorption hydrogen ions

Easiest explanation: The generation or absorption of hydrogen ions is true on case of potentiometric biosensors and not calorimetric biosensors. The following is true for biosensor:

* Low sensitivity (10^-4 M) and low range (10^-4 – 10^-2 M) of thermistor can be used with greater sensitivity with reaction involving exothermicity.

* The low sensitivity of the system can be increased substantially by increasing the heat output by the reaction.