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J. Braz. Chem. Soc. vol.21 número12

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Academic year: 2018

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Figure  1.  Schematic  diagram  of  the  automated  low  system  used  to  preconcentration and determination of manganese by FAAS
Table 1. Values obtained from simplex optimization
Figure 2. Evolution of the variables levels values with the trials deined  by the simplex design method, (a) sampling low rate, (b) pH and (c)  eluent concentration.
Table  4.  Determination  of  manganese  in  river  waters  and  spike  tests  (µg L -1 , n = 3)

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