However in the lowest calibration solution, an S/N
ratio equaled 12, the limit of quantification (LOQ) was determined
at the level of the lowest standard (0.020 mg/L) as a multiplier of
LOD. During a single day, the repeatability amounted to 8% for the
concentration of 0.030 mg/L and to 3.7% for the concentration of
0.110 mg/L (n = 6).