Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
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Chapter 1, Problem 1.11QAP
Interpretation Introduction
(a)
Interpretation:
A standard-addition plot should be created using the data given.
Concept introduction:
A commonform of standard-addition method involves adding known amounts of a standard solution to sample aliquots containing a fixed volume. Measurements taken for each solution can be used to plot a standard-addition plot.
Interpretation Introduction
(b)
Interpretation:
Using the standard-addition plot constructed, the concentration of the unknown phenobarbital sample should be determined.
Concept introduction:
In a standard-addition plot, the graph can be extrapolated to obtain thevolume of standard reagentequivalent to the amount of analyte in the sample (
Where,
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