The LVI mode made the quantification of 33 compounds at a
level of 0.01 mg kg−1 possible using the concurrent backflushing
set-up. Around 15 residues showed no differences
when using one or other of the conditions for extraction
(AOAC, CEN) and clean-up (general purpose and pigmented
matrices). Conversely, half of the 33 compounds almost
always showed that these factors were significant. The findings
for the latter results showed an interaction, and thus it
was found that the use of GCB, only in the case of the
version of the AOAC method, gave lower quality results.
The use of the CEN method is preferred since it can efficiently
extract the analytes and also allows them to remain in
the extract after clean-up. As the size of the analytical suites
increase, the conclusion is that employing GCB becomes
less useful since the additional pesticides, which are likely to
be of increasing molecular complexity, are adversely affected
by GCB in terms of critical parameters such as recovery and
precision.