3.4. Precision
This parameter was calculated in terms of reproducibility.
A series of 10 measurements of samples containing 10−8M of
Sb(III) were carried out obtaining a %R.S.D. value of 2.69%.
3.5. Accuracy
The accuracy of the proposed method was evaluated by
means of the analysis of a certified sample in comparison to
the corresponding National Institute of Standards and Technology.
The Sb(III) concentration quantified (11.33±0.12gL−1;
n=5; α = 0.05) matches the certified value of the sample
(11.22±0.04gL−1) considering the associated uncertainties.
Therefore, the proposed method is both accurate and suitable
for the analysis of Sb(III).