Question

The minimum response time of Ion-selective electrodes is ________

(a) 10 secs

(b) 15 secs

(c) 5 secs

(d) 20 secs

I have been asked this question in an online interview.

This is a very interesting question from Instrumentation and Control in section Instrumentation and Control of Fermentation Technology

Answer 1

The correct option is (a) 10 secs

To explain: The minimum response of ion-selective electrode is 10 seconds. It is used to measure NH4^+, K^+, SO2^–, etc. in the composition of the sample. The response time depends on the concentration of ion species in the sample.