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Pharmaceutical Analysis
book

Pharmaceutical Analysis

by P. D. Chaithanya Sudha
July 2012
Intermediate to advanced content levelIntermediate to advanced
758 pages
17h 12m
English
Pearson India
Content preview from Pharmaceutical Analysis

Chapter 3

Coulometry

INTRODUCTION

This method is the measurement of the quantity of the electricity. This is mainly estimated by the reaction of electrode. There are mainly two types of coulometric techniques. They are as follows:

  • Controlled potential coulometry.
  • Constant current coulometry.
PRINCIPLE

The main principle involved in the coulometry is the measurement of the quantity of the electricity which is directly proportional to the chemical reaction at the electrode. This is given by the Faraday's first law:

 

Image

 

where Q is the consumed current; Mr is the relative molecular weight.

THEORY

The coulometric methods are mainly based on the measurement ...

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Publisher Resources

ISBN: 9789332515659