3.3. Accuracy, precision and limit of detection of method
Under the optimum conditions, simultaneous determination of
different binary mixtures of Sb(III) and Sb(V) were made using
HPSAM. As Table 2 shows, the accuracy of the results is satisfactory.
To check the reproducibility of the method, five replicate experiments
were made and the standard deviation was obtained as 0.003
and 0.004 for 0.04 g mL−1 Sb(III) and Sb(V), respectively.
Limit of detection was calculated as LOD = 3sCH, where sCH is
the standard deviation of several (n = 5) replicated measurements
of zero concentration of analytes with HPSAM. The obtained corresponding
values for Sb(III) and Sb(V) were 0.001 and 0.002 g mL−1,
respectively. These amounts are very lower than those were