2.5. Quality assurance
Several parameters were evaluated for the validation of the analytical
method followed, for determination of minor and trace elements
in milk and yogurts.
The capability of the method as a routine analysis method was
estimated through the determination of the detection limits of
every element studied. The limits of detection (LOD) and limits
of quantification (LOQ), were calculated with three and ten times
the standard deviation of the blank divided by the slope of the analytical
curve, respectively (Thompson, Ellison, & Wood, 2002). The
values of LOD were in the range of 0.002–1.6 (ng/g) and the LOQ