Cd is determined in food stuff by a GFAAS method. This analysis method
involves a preparatory sample destruction step to free the Cd from organic
substances. 10 blank values are obtained by analyzing Cd-free samples with the
same procedure. These 10 blank samples yielded the
following values (area under the curve):
0.035, 0.023, 0.017, 0.045, 0.033, 0.020, 0.041, 0.026, 0.013, 0.022.
A relatively simple definition (there are different possibilities!) of the limit
of detection
(LOD) is that it is equal to the average signal of a blank sample plus three times the
standard
deviation of the measurements:
Calculate the mean and the standard deviation of these values and use them to
determine
the LOD for the GFAAS method.
NOTE: separate decimals with a dot (.), not with a comma (,)!
