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 estimated from the instrumental limits and taking into account the apparent recoveries. MQLs were fixed as the lowest point in thematrix-matched calibration curves