Recoveries were calculated by comparing the concentrations of the extracted compounds with those from the MMC calibration curves. These data were also used to determine the intermediate precision of the method and quantifying the measurement uncertainty (MU). Repeatability, expressed as relative standard deviation (RSD), was evaluated from replicate samples (n = 6) analyzed at the same day for each level. The intermediate precision, expressed as relative standard deviation (RSD), was evaluated through replicates data (n = 18) of the three different days for each level.