Recovery data were calculated and compared with the
appropriate working standard solutions prepared with the hepatopancreas extracts. The hepatopancreas free from pesticides was fortified at three different concentrations (1, 2 and 10-fold LOQ)
and residues were quantified by using the matrix-matched standard. Average recoveries for fish liver ranged from 57 to 107%, with relative standard deviations (RSD) from 5 to 26%, and for crab
hepatopancreas, between 56 and 122% with RSDs lower than 21, as
can be seen in Table 3. Precision and accuracy were considered
adequate to validate the method in accordance with the validation
criteria. Fig. 4 shows the chromatogram of a standard solution and
a spiked fish liver sample.