OPTIMASI PENENTUAN Ni(II) DAN Fe(II) SECARA SIMULTAN DENGAN VOLTAMMETRI STRIPING ADSORPTIF (AdSV)
Abstract: A selective
and sensitive adsorption
stripping voltammetry (AdSV)
procedure for the simultaneous determination of nickel and
iron was conducted. The aim of this research is to get optimum condition
for simultaneous determination
of nickel and
iron. Adsorptive stripping voltammetry has been used for
determination of trace amount Ni(II) and Fe(II) by using calcon as a complexing
agent. The parameters
studied were variation
of calcon concentration, pH, accumulation potential
and accumulation time.
In this study,
the optimum conditions
were calcon concentration of 0.6 mM, pH = 7.0, accumulation potential of
-0.2 V and accumulation time of 110 sec. at the optimum conditions, the
relative standard devation were 10.45% for Ni(II) and 1.06% for
Fe(II) respectively for 8 replicates
(n=8) measurements of 50 µg/L
for Ni(II) and 10
µg/L for
Fe(II). The method
was applied to
the direct simultaneous
determination of Ni(II)
and Fe(II) in crane
water, river water
of Batu Busuk
and sea water
around Bungus, Padang
City. Concentration of Ni(II) and
Fe(II) in samples crane water were equal to 2.04 µg/L for Ni(II) and 198.84 µg/L
for Fe(II), in the river
water a Batu Busuk
are 1.72 µg/L
for Ni(II) and
264.71 µg/L for Fe(II)) and from
the sea water of Bungus Padang are 19.35 µg/L for Ni(II) and 441.31 µg/L for Fe(II)
with recovery of 78.84% for Ni(II) and 100.24% for Fe(II), respectively.
Penulis: Raesa Pratiwi Putri,
Deswati, Hamzar Suyani
Kode Jurnal: jpkimiadd140481
