Author/Authors :
Sarjuna, Sarjuna Department of Chemistry - Faculty of Mathematics and Natural Sciences - Universitas Halu Oleo - Jl. HEA Mokodompit Kampus Hijau Bumi Tridharma - Anduonohu - Kendari 9323 –Southeast Sulawesi, Indonesia , Nurdin, Muhammad Department of Chemistry - Faculty of Mathematics and Natural Sciences - Universitas Halu Oleo - Jl. HEA Mokodompit Kampus Hijau Bumi Tridharma - Anduonohu - Kendari 9323 –Southeast Sulawesi, Indonesia , Dali, Nasriadi Department of Chemistry - Faculty of Mathematics and Natural Sciences - Universitas Halu Oleo - Jl. HEA Mokodompit Kampus Hijau Bumi Tridharma - Anduonohu - Kendari 9323 –Southeast Sulawesi, Indonesia , Irwan, Irwan Department of Chemistry - Faculty of Mathematics and Natural Sciences - Universitas Halu Oleo - Jl. HEA Mokodompit Kampus Hijau Bumi Tridharma - Anduonohu - Kendari 9323 –Southeast Sulawesi, Indonesia , Maulidiyah, Maulidiyah Department of Chemistry - Faculty of Mathematics and Natural Sciences - Universitas Halu Oleo - Jl. HEA Mokodompit Kampus Hijau Bumi Tridharma - Anduonohu - Kendari 9323 –Southeast Sulawesi, Indonesia , Ruslan, Ruslan Department of Chemistry - Faculty of Mathematics and Natural Sciences - Universitas Tadulako - Palu 94118–Central Sulawesi, Indonesia , Hamzah, Baharuddin Department of Chemistry - Faculty of Mathematics and Natural Sciences - Universitas Tadulako - Palu 94118–Central Sulawesi, Indonesia
Abstract :
Pb2+ ion was investigated by voltammetry selectivity using TiO2-Ionophores
hexa(p-tert butyl)hexa(ethyl ester)calix[6]arene (BEK6) composite to increase the selectivity
and sensitivity of carbon paste electrode (CPE). The BEK6 was synthesized by using
hydrolysis method, meanwhile the TiO2-P25 and graphite powder were mixed as an electrode
composite. The Scanning Electron Microscopy (SEM) shows that the CPE doped TiO2-BEK6
(CPE/TiO2-BEK6) have morphology likes a rough, non-porous, composed of fine particles,
and homogeneously. The presence of Pb2+ ion in pH 5 citrate buffer electrolyte causes the
peaks appearance on Epa and Epc were 0.17 V and 0.37 V with the peak potential current generated of 15.15 μA and -12.0 μA, respectively. The 0.005 g BEK6 was increased
significantly the peak current of the Pb2+ ion with the LOD value of 0.1756. In addition, the
presence of TiO2-BEK6 composite shows the measurement current stability by %RSD of
0.83.
Keywords :
Selectivity , Cyclic voltammetry , TiO2-BEK6 , Ionophore , Pb2+
