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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Question
Chapter 20, Problem 20.17QAP
Interpretation Introduction
Interpretation:
The ions responsible for the peaks in the given mass spectrum should be identified.
Concept introduction:
Mass spectrometry is a powerful analytical technique which is used to elucidate structure of compounds, quantify materials, identify unknown compounds etc. In mass spectrophotometer, the molecule is ionized by giving it a positive charge by removing an electron or by adding a proton. The molecule may break into several positively charged fragments according to the ionization method used. Then, in a mass analyzer, these cationic molecular fragments are separated based on their mass and detected by the detector. Only positively charged molecular fragments are detected by the detector.
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Provide a structure of the fragment in the mass spec producing the peak at 139 m/z and a structure for the fragment that was lost.
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