The linear range of the method was evaluated by linear regres-sion analysis of eight-point matrix-matched calibration curves.MDLs for analytes non-present in the sample were calculated as the minimum detectable amount of analyte with a signal-to-noise ratio of 3. MDLs for the analytes present in the samples, were esti-mated from the instrumental limits and taking into account the apparent recoveries. MQLs were fixed as the lowest point in thematrix-matched calibration curves