Principles of Instrumental Analysis
Principles of Instrumental Analysis
7th Edition
ISBN: 9781337468039
Author: Skoog
Publisher: Cengage
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Chapter 5, Problem 5.6QAP
Interpretation Introduction

Interpretation:

Signal-to-noise ratio for a DC current shown in a figure should be estimated.

Concept introduction:

The mean current is given as 0.9×1015 A.

For a DC current, the signal-to-noise ratio is defined as follows,

SN=meanstandard deviation=x¯s

If the deviation from the mean value is assumed to be random, the standard deviation of a DC current can be measured as follows,

standard deviation=maximum signal minimum signal5

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