All the validation studies were performed with previously analyzed pesticide-free cherry tomatoes. The linearity in the response was studied by using matrix-matched calibration solutions. Nine points (average of three injections) calibration curves based on peak area data were constructed in the concentration range 0.1–100 g/mL. The resulting correlation coefficients were higher than 0.994 in all cases. The calibration curves were used for quantification purposes. Recovery assays were done in triplicate by coating homogenized samples. The mean recoveries obtained with coated samples and ranged from 88% to 105% with relative standard deviations (RSDs) below 10%.