3.3. Optimisation of experimental chemical and physical variables
Similar experimental results were obtained for both columns so, the
graphs of Fig. 3 are the only depicted peaks obtained when the column
filledwith pro-MWCNTswas used. The four graphs in Fig 3 showthe results
obtained for the preconcentration of 10 μg Sb L−1 solutions, each
graph corresponds to a specific eluent condition assessed.