Question

Which of the following are used to free bound ions or liberate bound ions?

(a) Colouring agents

(b) Ammonia Buffer

(c) Reagents

(d) Iodine solution

I had been asked this question at a job interview.

This is a very interesting question from Sodium Analyser in section Dissolved Component Analysers of Analytical Instrumentation

Answer 1

Right choice is (c) Reagents

To explain: Reagents are used to free bound ions or liberate bound ions. The addition of reagent prevents unwanted ions from entering into the measurement.