Several criteria such as linearity (1 - 200 µg / L), method detection limit (MDL) (0.12 - 0.30 µg / L), quantitation limit (LOQ) (0.40 - 1.00 µg / L); repeatability (3.39 - 9.24%); within-laboratory reproducibility (3.57 - 8.29%), recovery (95.16 - 106.25%) and measurement uncertainty (14.24 - 23.68%) were evaluated.