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Symmetry Factor (AS): The symmetry factor (also known as the tailing factor) of a peak is calculated by:
AS = W0.05/2f
where W0.05 is the width of the peak at 5% height and f is the distance from the peak maximum to the leading edge of the peak, the distance being measured at a point 5% of the peak height from the baseline.

Tailing Factor (T): See Symmetry Factor.
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