Chapter 15, Problem 15.EE

Interpretation Introduction

Interpretation:

The weight % nitrogen in the food sample has to be calculated.

Concept Introduction:-

Response of ion-selective electrode:

The response of an ion-selective electrode to its primary ion (A) and to interfering ions of the same charge, when the response to every ion is Nernstian.

$\text{E=}\text{constant+}\frac{\text{0}\text{.05916}}{{\text{z}}_{\text{A}}}\text{log}\left[{\text{A}}_{\text{A}}\text{+}{\displaystyle \sum _{\text{X}}^{}{\text{K}}_{\text{A,X}}^{\text{Pot}}}{\text{A}}_{\text{X}}\right]$

Where,

$\text{E}$ =cell potential.

${\text{Z}}_{\text{A}}$ =Charge

${\text{K}}_{\text{A,X}}^{\text{Pot}}$ =selectivity coefficient.