Figure 1:
The influence of pH of the aqueous phase in the formation and extraction of the complrx of manganese (II) with Phen and oNBASA, (C
Mn
=2.23 × 10
-5
M, CPhen=2 × 10
-4
M, C
oNBASA
=1.5 × 10
-4
M, KFK
-3
, λ=400 nm).
