Page 95 - Practical-organic-3
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• For some compounds, M peak with (+1) (m/z) ratio value could be detected, and it
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+
corresponds to C isotope of the analyzed compound, where the normal M peak
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corresponds to C isotope.
• For halogenated compounds:
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Appearance of M is a necessity for those compounds since higher isotopes of chlorine
and bromine have high relative abundance; therefore, their presence is significant in
mass spectra.
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