The calculations for the statistical limit of detection (LOD) and
limit of quantification (LOQ) were based on the standard deviation
of y-intercepts of regression analysis (r) and the slope (S). The LOD
and LOQ were calculated from the ratio of 3 and 10 times of
standard deviation of the measurement blanks (n = 11) to the slope
of the linear section of calibration graph, was 1.5 lg L1 and
5.2 lg L1
, respectively.