MS

The M+ peak and the base peak

June 9, 2022
MS

The M+ peak (signal) is the parent peak. It represents the cation molecule. Its m/z is associated with the molar mass of compound.
The base peak represents the most stable cation fragment. It is a stable intermediate, not a stable structure. Its intensity is set as 100, everything else is in comparison to it. It could represent the M+.

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The M+, M+1 and M+2 Peaks

June 9, 2022
MS

M+ peak represents the compound. It is often referred to as the parent peak.
M+1 peak represents the compound with isotope. The chance of finding a C-13 is one in 100. C-13 and N-15 can be responsible for M+1 peak. M+2 peak represents the compound having either chloride or bromide isotope.

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