Half-bandwidth, definition

Peak Width. Peak width depends on the mass resolution. A resolution of 1 mass unit is sufficient to distinguish ions in most qualitative/quantitative small molecule applications. A typical definition of unit resolution is when the peak width at half-height is about 0.6 to 0.8 mass unit. The profile scan of ions on a typical benchtop LC-MS has a bandwidth of about 1 mass unit (Figure 13.1). 

A somewhat arbitrary definition is made for bandwidth. Amplifier cutoff is defined as that frequency (coj at which the power output from the amplifier is one-half of the maximum power, or... 

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