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Definition: Tailing factor. The tailing factor is a measure of peak tailing. It is defined as the distance from the front slope of the peak to the back slope divided by twice the distance from the center line of the peak to the front slope, with all measurements made at 5% of the maximum peak height.t is defined as the distance from the front slope of the peak to the back slope divided by twice the distance from the center line of the peak to the front slope, with all measurements made at 5% of the maximum peak height.
3 LCâ¢GC Europe September 2003 LC Troubleshooting Tailing peaks are also problematic ifminor peaks occur in the same sample asmajor ones; for example, during a stability-indicating assay or a measurement ofmetabolites or impurities.or all the peaksshown, the start of the peak is the same,and it is easy for the data system todetermine when the peak starts. The morethe peak tails, the more gradual the returnto baseline. In addition, the end of thepeak is difficult to determine, especially ifthe baseline is not smooth.