Figure 5: SEM-FEG analyses of rifampicin: (a) raw rifampicin was diluted (0.002 kg) in water and filtered for the analysis and in (b) rifampicin nanoparticles obtained by nanoprecipitation in the microfluidic system using 200 μL/min of water flow, rifampicin concentration of 50 mg/mL and ratio between phases (R) equal 50.