2.6. Validation studies
Calibration data and matrix effect assessment, precision
(when repeated independent assays were performed), accuracy (when recovery assays were performed), sensitivity
and limits of quantitation as well as the associated global
uncertainty were calculated for the analytical methodology
developed.
Recovery assays were performed by spiking uncontaminated
tomato and grape (10 g homogenized sample) and wine
(10 mL of wine) samples at different levels with fungicides
working solutions. The spiked samples were allowed to equilibrate
for one hour before extraction to allow the spiked
solution to penetrate the test material. Replicated (n = 5) samples
were all run and the recovery values were calculated for
each.