Precision and Accuracy of the System

Precision and accuracy were assessed on three consecutive days by using mixtures containing low, medium, or high concentrations of the analytes' standard solution. Precision was expressed as the RSD %, and accuracy (% RE) was calculated using the following equation:

$$\begin{aligned} \text{[(mean measured concentration-concentration of standard solutions)]}\\ \text{(concentration of standard solutions)}] \times 100. \end{aligned} \tag{2}$$
