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REPOSITORIO INSTITUCIONAL DA UFOP: Use of Al2O3 in an automated on-line pre-concentration system for determination of cadmium(II) by FAAS.

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Academic year: 2018

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Fig. 1. On-line pre-concentration system: (a) adsorption step and (b) desorption step
Fig. 3. SEM images for the macro-spheres heat-treated at 550 ◦ C: (a) porous macro-spheres Al 2 O 3 and (b) macro-spheres mean size 940 ␮m.
Fig. 5. Pareto chart obtained for full factorial design: (A) absorbance signal and (B) efficiency of signal
Fig. 6. Response surface obtained using Doehlert matrix to optimize sample pH and sample flow rate.

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