The High and Low Off-Peak Interference buttons can be used when both the potential interfering and interfered with elements are already present in the sample setup to determine the approximate magnitude of the off-peak interferences. This calculation is based on a Gaussian peak shape and various crystal defaults and is intended as a guideline only for off-peak position entry.
The program assumes a nominal concentration of 100% of the interfering element and 1% of the interfered with element in each binary pair calculation. For example, if the percent interference is calculated as 10%, then that indicates that instead of measuring 1 wt. % of the element, it is likely that a concentration of 10% greater than 1 wt. % or 1.1 wt. % will be measured. Note that since this is only a nominal calculation, it should only be used as an indicator of possible problematic analytical situations.