July 2012
Intermediate to advanced
758 pages
17h 12m
English
Content preview from Pharmaceutical Analysis
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Chapter 7
Nuclear Magnetic Resonance Spectroscopy
INTRODUCTION
NMR is defined as the measurement and interpretation of the radiofrequency which induces the transitions in the nuclei by absorbing the radiofrequency waves and the spectra are known as the nuclear magnetic resonance spectra. The atoms which contain the nuclei with the property are called the spin. The number of spins of the active spin nucleus is denoted by the spin quantum number, I. The spin is the property of the elements containing the odd mass or odd atomic number. The following Table shows the spin quantum numbers of the nuclei:
| Element | Spin quantum number (I) | Number of the spin states |
|---|---|---|
| 1H | 1/2 | 2 |
| 2H | 1 | 3 |
| 13C | 1/2 | 2 |
| 14C | 1 | 3 |
Table for the elements with the spin quantum number ...