Error Bar Calculations

Error Bar Calculations

The formula for these error calculations are as specified:

 

On Peak Counts Errors:

 

          Where:          = On-peak counts (including background, de-normalized for deadtime, beam current and time)

 

Note that the result is normalized to deadtime, beam current and count time after the square root is calculated and before it is displayed.

 

            K-Ratio Errors:

 

          Where:          = Unknown on peak counts (background corrected, de-normalized for deadtime, beam and time)

                    = Standard on peak counts (background corrected, de-normalized for deadtime, beam and time)

                    = ZAF correction for standard counts (to obtain pure element counts)

 

Note that the result is normalized to deadtime, beam current and count time after the square root is calculated and before it is displayed.

 

            Elemental (or Oxide) Weight Percent Errors:

 

 

          Where:                    = K-ratio error (from above)

                              = unknown ZAF correction factors